diff --git a/projects/simplified-ui/src/lib/models/DataTableModel.ts b/projects/simplified-ui/src/lib/models/DataTableModel.ts
index dc2d8a1..9f757a0 100644
--- a/projects/simplified-ui/src/lib/models/DataTableModel.ts
+++ b/projects/simplified-ui/src/lib/models/DataTableModel.ts
@@ -126,11 +126,18 @@ export class DataTable<T> {
    * @param index Index at which the column should be added.
    */
   addColumn(column: IDataTableColumn, index?: number): void {
-    if (index) {
-      this.columns.splice(index, 0, column);
+    // updates the existing column when key is same
+    if (this.columns.some(i => i.key == column.key)) {
+      var prevColumnIndex = this.columns.findIndex(i => i.key == column.key);
+      this.columns[prevColumnIndex] = column;
     } else {
-      this.columns.push(column);
+      if (index) {
+        this.columns.splice(index, 0, column);
+      } else {
+        this.columns.push(column);
+      }
     }
+
     this.columnAddedSubject.next(column);
     this.columnsUpdatedSubject.next(this.columns);
   }
diff --git a/projects/simplified-ui/src/lib/sa-data-table/sa-data-table.component.ts b/projects/simplified-ui/src/lib/sa-data-table/sa-data-table.component.ts
index 70837b9..4af9e0e 100644
--- a/projects/simplified-ui/src/lib/sa-data-table/sa-data-table.component.ts
+++ b/projects/simplified-ui/src/lib/sa-data-table/sa-data-table.component.ts
@@ -122,8 +122,12 @@ export class SaDataTableComponent<T> implements OnInit, AfterViewInit, OnDestroy
 
   ngOnInit() {
     this.actionsTemplate = this.dataTable.actionsTemplate;
+
+    this.dataTable.onColumnRemoved().subscribe(res => {
+      this.filterArray = this.filterArray.filter(x => x.key != res.filter.key)
+    });
+
     this.dataTable.onColumnUpdated().subscribe((columns) => {
-      this.filterArray = [];
       columns.forEach((z) => {
         if (z.filter != null) this.filterArray.push(z.filter);
       });