CSS not Updating

Hi.

I am working on this site: (see notes) before I deploy it live.. the CSS has stopped updating. no changes I am making are being reflected.

I have cleared all my browser caches, I’ve had my hosting company flush everything on their end. and nothing seems to matter.
I know the custom css works, because I was able to see the change about an hour ago.. but not since.

I have tried the child theme CSS file as well as the quick CSS in the dashboard.. and now neither option is working. though they both did this morning.

.html_header_sidebar #top #header {
  width: 220px;
}

.html_header_left #main {
  margin-left: 220px;
}

.avia_combo_widget .news-thumb {
    height: 50px !important;
    width: 50px !important;
}

.avia_combo_widget .news-thumb img {
    height: 50px !important;
    width: 50px !important;
}

.avia_combo_widget .tab.widget_tab_comments,
.avia_combo_widget .tab.widget_tab_recent {
    display: none !important;
}

Dreamhost are saying they done all they can do on their end… I am at a loss.
I am happy to provide a login for help.

Thanks

Thanks!!