diff --git a/core/templates/core/payroll_dashboard.html b/core/templates/core/payroll_dashboard.html
index 34ea07f..de30c76 100644
--- a/core/templates/core/payroll_dashboard.html
+++ b/core/templates/core/payroll_dashboard.html
@@ -777,7 +777,10 @@
                             <th style="width: 40px;">
                                 {# aria-label is the accessible name screen readers announce; #}
                                 {# title= is kept as the mouse-hover tooltip for sighted users. #}
-                                <input type="checkbox" class="form-check-input" id="adjSelectAll"
+                                {# Distinct id from the Add-Adjustment modal's own #adjSelectAll #}
+                                {# anchor (line ~940) — duplicate ids are invalid HTML and caused the #}
+                                {# modal's Select-All handler to silently bind to this checkbox instead. #}
+                                <input type="checkbox" class="form-check-input" id="adjTableSelectAll"
                                        aria-label="Select all unpaid adjustments on this page"
                                        title="Select all unpaid on this page">
                             </th>
@@ -3596,14 +3599,16 @@ document.addEventListener('DOMContentLoaded', function() {
         // === ADJUSTMENTS TAB — bulk select + delete ===
         // The per-row checkboxes come from _adjustment_row.html (class
         // .adj-bulk-checkbox on unpaid rows only; disabled dummy checkbox on
-        // paid rows for visual alignment). The header has an #adjSelectAll
-        // that toggles all visible unpaid checkboxes. A floating action bar
-        // (#adjBulkBar) appears when >=1 row is selected.
+        // paid rows for visual alignment). The header has #adjTableSelectAll
+        // (renamed from #adjSelectAll to avoid a duplicate-id collision with
+        // the Add-Adjustment modal's own Select-All anchor) that toggles all
+        // visible unpaid checkboxes. A floating action bar (#adjBulkBar)
+        // appears when >=1 row is selected.
         var bulkBar = document.getElementById('adjBulkBar');
         var bulkCount = document.getElementById('adjBulkCount');
         var bulkDeleteBtn = document.getElementById('adjBulkDeleteBtn');
         var bulkClearBtn = document.getElementById('adjBulkClearBtn');
-        var selectAll = document.getElementById('adjSelectAll');
+        var selectAll = document.getElementById('adjTableSelectAll');
 
         // CSRF via cookie — Django middleware sets this cookie on GET requests.
         function getCookie(name) {