diff --git a/api/v2/memo_resource_service.go b/api/v2/memo_resource_service.go
index 5c64efc0..6d0937a4 100644
--- a/api/v2/memo_resource_service.go
+++ b/api/v2/memo_resource_service.go
@@ -2,6 +2,8 @@ package v2
 
 import (
 	"context"
+	"slices"
+	"time"
 
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -11,7 +13,9 @@ import (
 )
 
 func (s *APIV2Service) SetMemoResources(ctx context.Context, request *apiv2pb.SetMemoResourcesRequest) (*apiv2pb.SetMemoResourcesResponse, error) {
-	resources, err := s.Store.ListResources(ctx, &store.FindResource{MemoID: &request.Id})
+	resources, err := s.Store.ListResources(ctx, &store.FindResource{
+		MemoID: &request.Id,
+	})
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "failed to list resources")
 	}
@@ -35,11 +39,14 @@ func (s *APIV2Service) SetMemoResources(ctx context.Context, request *apiv2pb.Se
 		}
 	}
 
+	slices.Reverse(request.Resources)
 	// Update resources' memo_id in the request.
-	for _, resource := range request.Resources {
+	for index, resource := range request.Resources {
+		updatedTs := time.Now().Unix() + int64(index)
 		if _, err := s.Store.UpdateResource(ctx, &store.UpdateResource{
-			ID:     resource.Id,
-			MemoID: &request.Id,
+			ID:        resource.Id,
+			MemoID:    &request.Id,
+			UpdatedTs: &updatedTs,
 		}); err != nil {
 			return nil, status.Errorf(codes.Internal, "failed to update resource")
 		}
diff --git a/store/db/mysql/resource.go b/store/db/mysql/resource.go
index ec1c1f63..d277cf46 100644
--- a/store/db/mysql/resource.go
+++ b/store/db/mysql/resource.go
@@ -63,7 +63,7 @@ func (d *DB) ListResources(ctx context.Context, find *store.FindResource) ([]*st
 		fields = append(fields, "`blob`")
 	}
 
-	query := fmt.Sprintf("SELECT %s FROM `resource` WHERE %s GROUP BY `id` ORDER BY `created_ts` DESC", strings.Join(fields, ", "), strings.Join(where, " AND "))
+	query := fmt.Sprintf("SELECT %s FROM `resource` WHERE %s ORDER BY `updated_ts` DESC, `created_ts` DESC", strings.Join(fields, ", "), strings.Join(where, " AND "))
 	if find.Limit != nil {
 		query = fmt.Sprintf("%s LIMIT %d", query, *find.Limit)
 		if find.Offset != nil {
diff --git a/store/db/postgres/resource.go b/store/db/postgres/resource.go
index b344dbf0..235f56bf 100644
--- a/store/db/postgres/resource.go
+++ b/store/db/postgres/resource.go
@@ -49,8 +49,7 @@ func (d *DB) ListResources(ctx context.Context, find *store.FindResource) ([]*st
 			%s
 		FROM resource
 		WHERE %s
-		GROUP BY id
-		ORDER BY created_ts DESC
+		ORDER BY updated_ts DESC, created_ts DESC
 	`, strings.Join(fields, ", "), strings.Join(where, " AND "))
 	if find.Limit != nil {
 		query = fmt.Sprintf("%s LIMIT %d", query, *find.Limit)
diff --git a/store/db/sqlite/resource.go b/store/db/sqlite/resource.go
index 12a34fcd..2c7fde73 100644
--- a/store/db/sqlite/resource.go
+++ b/store/db/sqlite/resource.go
@@ -51,8 +51,7 @@ func (d *DB) ListResources(ctx context.Context, find *store.FindResource) ([]*st
 			%s
 		FROM resource
 		WHERE %s
-		GROUP BY id
-		ORDER BY created_ts DESC
+		ORDER BY updated_ts DESC, created_ts DESC
 	`, strings.Join(fields, ", "), strings.Join(where, " AND "))
 	if find.Limit != nil {
 		query = fmt.Sprintf("%s LIMIT %d", query, *find.Limit)