For the past week, BBedit .htm files have been overwriting each other.

When I try to save an existing .htm file, it will copy itself to
another existing .htm, overwriting its contents.

Then it will delete itself entirely from my hard drive.

There will not even be a copy of the old file in the trash.

Has anyone had this problem?

It is destroying my work and making it impossible for me to continue
using BBedit.

BTW, this problem started occurring about a week ago, and occurred on
two different computers, one an old MacBookPro and the other one a new
MacBookPro to which I copied the contents of the old one.

It also occurs with both the newest version of BBedit and an older
version.

Is there possibly a hidden merge file command run amok that is at
fault here?