diff --git a/guarddog_nexus/constants.py b/guarddog_nexus/constants.py
index 8f28f81..d3e57fd 100644
--- a/guarddog_nexus/constants.py
+++ b/guarddog_nexus/constants.py
@@ -60,7 +60,7 @@ PACKAGE_SORT_FIELDS = {
     "flagged": "flagged",
 }
 
-DEFAULT_SORT_BY_SCANS = "started_at"
+DEFAULT_SORT_BY_SCANS = "id"
 DEFAULT_SORT_BY_PACKAGES = "last_scanned_at"
 DEFAULT_SORT_DIR = "desc"
 
diff --git a/guarddog_nexus/web/static/style.css b/guarddog_nexus/web/static/style.css
index fd80346..ac4514a 100644
--- a/guarddog_nexus/web/static/style.css
+++ b/guarddog_nexus/web/static/style.css
@@ -262,7 +262,7 @@ nav.sticky    { position: sticky; top: 0; z-index: 100; background: #13171f; pad
 th.sortable { cursor: pointer; user-select: none; }
 th.sortable:hover { background: #202632; }
 
-thead th { background: transparent !important; color: inherit !important; border-color: #202632 !important; }
+thead th { background: transparent !important; color: inherit !important; border-bottom: 3px solid #202632 !important; }
 th.sortable .sort-icon { margin-left: 0.25rem; opacity: 1; }
 
 /* ------------------------------------------------------------------ */