diff --git a/src/utils/elementCombination.js b/src/utils/elementCombination.js
index cf00b3e..cd9e3d4 100644
--- a/src/utils/elementCombination.js
+++ b/src/utils/elementCombination.js
@@ -6,6 +6,21 @@ const ELEMENT_TYPES = {
   '流水号': 'serialNumber'
 }
 
+// labelNo 已持久化；新建元素在首次保存前使用画布 ID，由后端统一映射。
+export function getElementReferenceKey (element) {
+  const key = element.labelNo || element.id
+  return key == null ? null : String(key)
+}
+
+export function getElementReference (element) {
+  if (element.combinationReference) return element.combinationReference
+  const typeName = Object.keys(ELEMENT_TYPES).find(name => ELEMENT_TYPES[name] === element.type) || element.type
+  const key = getElementReferenceKey(element)
+  const identity = key == null ? '' : `@${encodeURIComponent(key)}`
+  const content = element.data ? `(${element.data})` : ''
+  return `${typeName}${identity}${content}`
+}
+
 // 按配对花括号读取引用，保留 #{字段} 和嵌套组合，不用简单的 /{[^}]+}/ 截断内容。
 export function parseElementCombination (data) {
   const value = data == null ? '' : String(data)
@@ -22,9 +37,13 @@ export function parseElementCombination (data) {
 
     if (start === 0 || value[start - 1] !== '#') {
       const reference = value.slice(start + 1, end - 1)
-      const match = /^(文本|一维码|二维码|图片|流水号)(?:\(([\s\S]*)\))?$/.exec(reference)
+      const match = /^(文本|一维码|二维码|图片|流水号)(?:@([^(){}]+))?(?:\(([\s\S]*)\))?$/.exec(reference)
       if (match) {
-        references.push({start, end, reference, type: ELEMENT_TYPES[match[1]], data: match[2]})
+        let elementKey = match[2]
+        if (elementKey !== undefined) {
+          try { elementKey = decodeURIComponent(elementKey) } catch (error) { /* 保留损坏标识，不能按同名元素兜底。 */ }
+        }
+        references.push({start, end, reference, type: ELEMENT_TYPES[match[1]], data: match[3], elementKey})
       }
     }
     start = end - 1
diff --git a/src/utils/zplGenerator.js b/src/utils/zplGenerator.js
index fff68b2..e24e34a 100644
--- a/src/utils/zplGenerator.js
+++ b/src/utils/zplGenerator.js
@@ -237,7 +237,7 @@ export class ZPLGenerator {
     }
     const weekNo = Math.floor((diffDays - daysToNextWeekStart) / 7) + 2
     const normalizedWeekNo = Math.max(1, weekNo)
-    return `${String(normalizedWeekNo).padStart(2, '0')}${String(date.getFullYear() % 100).padStart(2, '0')}`
+    return `${String(date.getFullYear() % 100).padStart(2, '0')}${String(normalizedWeekNo).padStart(2, '0')}`
   }
 
   calculateWeekday(date, firstDayOfWeekStr) {
diff --git a/src/views/modules/labelSetting/components/ElementCombinationDialog.vue b/src/views/modules/labelSetting/components/ElementCombinationDialog.vue
index 17264a2..308d01b 100644
--- a/src/views/modules/labelSetting/components/ElementCombinationDialog.vue
+++ b/src/views/modules/labelSetting/components/ElementCombinationDialog.vue
@@ -127,7 +127,7 @@
 </template>
 
 <script>
-import { parseElementCombination } from '@/utils/elementCombination'
+import { parseElementCombination, getElementReference, getElementReferenceKey } from '@/utils/elementCombination'
 
 let nextElementId = 0
 
@@ -154,6 +154,7 @@ export default {
       selectedElements: [],
       separator: '-',
       originalReferences: [],
+      originalSelectedElementIds: [],
       originalCombinationData: '',
       originalSeparator: '-'
     }
@@ -205,9 +206,14 @@ export default {
       this.selectedElements = references.map((reference, index) => {
         const savedId = savedConfig && savedConfig.selectedElements && savedConfig.selectedElements[index]
         const candidates = this.allElements.filter(element => element !== this.targetElement && element.type === reference.type)
-        const source = (savedId != null && candidates.find(element => element.id === savedId)) ||
-          candidates.find(element => this.getElementFullName(element) === reference.reference) ||
-          (reference.data === undefined && candidates[0])
+        // 显式身份未命中表示来源已删除，不能串用同名元素的公式。
+        const matches = candidates.filter(element => reference.data === undefined || this.getElementFullName(element) === reference.reference)
+        const source = reference.elementKey !== undefined
+          ? candidates.find(element => getElementReferenceKey(element) === reference.elementKey)
+          : savedId != null
+            ? candidates.find(element => element.id === savedId)
+            // 历史同名引用未记录身份时不能猜测来源，保留引用，待用户重新选择。
+            : matches.length === 1 ? matches[0] : null
         // 来源已删除时保留原引用，避免打开后直接确定就悄悄丢失内容。
         return source || {
           id: `missing_${index}`,
@@ -217,6 +223,8 @@ export default {
         }
       })
 
+      this.originalSelectedElementIds = this.selectedElements.map(element => element.id)
+
       if (savedConfig && savedConfig.separator != null) {
         this.separator = String(savedConfig.separator)
       } else if (references.length > 1) {
@@ -229,6 +237,7 @@ export default {
       this.selectedElements = []
       this.separator = '-'
       this.originalReferences = []
+      this.originalSelectedElementIds = []
       this.originalCombinationData = ''
       this.originalSeparator = '-'
     },
@@ -378,13 +387,18 @@ export default {
     },
 
     generateSequenceFormat() {
-      const references = this.selectedElements.map(element => this.getElementFullName(element))
-      // 未改动时保持原组合字面内容（含手工插入的不同间隔文字），确认不会重写或重复追加。
+      const references = this.selectedElements.map(element => getElementReference(element))
+      // 保留原有间隔文字，同时为每个引用写入独立身份；重排同名元素也能生效。
       if (this.originalReferences && this.originalReferences.length > 0 &&
           this.separator === this.originalSeparator &&
           references.length === this.originalReferences.length &&
-          references.every((reference, index) => reference === this.originalReferences[index])) {
-        return this.originalCombinationData
+          this.selectedElements.every((element, index) => element.id === this.originalSelectedElementIds[index])) {
+        const original = parseElementCombination(this.originalCombinationData)
+        let result = this.originalCombinationData
+        for (let index = original.length - 1; index >= 0; index--) {
+          result = result.slice(0, original[index].start) + `{${references[index]}}` + result.slice(original[index].end)
+        }
+        return result
       }
       return references.map(reference => `{${reference}}`).join(this.separator || '')
     }