Oh I see what`s happening, I was seeing the combined image in the explorer portion of PM6+, I thought the behavior would be the same in the catalog as well.
Is there any option that have the catalog behave the same?
As for the renaming, I was trying to rename the file inside the catalog with the right click / rename dialog. I didn't use any variables this time because I wanted a specific name, I tried to rename 20190413-01A to 20190413-01 to be precise but as I said the file then goes offline, the file is properly renamed in the windows file explorer but PM6+ still looks for 20190413-01A and of course can't find it.