Strange temp/duplicate/cache files?

Hi all,

I've tried searching the forums and Google for an answer to this, but haven't come up with any answers. My problem is that Dreamweaver CC 2018 is creating sort of duplicate local files that get pushed to the testing server (e.g., 'editDetails.php', 'editDetails_T0FTN694UO.php', 'editDetails_T1J39694W3.php'). That server then uses these files instead of the "correct" file, so the QA team complains to us that we're not making the fixes when their browser keeps hitting 'editDetails_T1J39694W3.php' while the URL reads 'editDetails.php.'

We've tried turning autopush and synchronize on and off, but it doesn't seem to make any difference. It's like these are some kind of temp file that Dreamweaver just isn't cleaning up. I've tried switching from Live preview to Design, but it still keeps wanting to default to Live preview. Any ideas on what these files are and how to keep them off the test server aside from manually finding and deleting them? Thank you!

Vince