I might be missing something obvious here, would appreciate assistance, done this more than 20 times already.

A screener after being saved the first time, resists any edit attempts even when using Save As. So no matter how many times I change the filter criteria and save, it reverts back to the original criteria when re-opened. The only reliable way to make it stick is to create a new screener from scratch. This is so poor that it boggles the mind so I do hope I am missing something obvious here because this defeats the intended function of Save As.

Hmm, cannot reproduce so far. Do you see any message pop up when you click the Save button?

It should look like this when the screener saves successfully, or an error message if save fails: