Same platform and version. I have seen this same issue.
Worse, I've occasionally seen it happen to script steps. I can only assume there's some magic keystroke or twitch that I'm doing accidentally, since it doesn't always happen, but this is very worrying. Bad enough to get scripts out of order in the list, but script steps jumping around is a critical issue.
I've reporting this using the "provide filemaker feedback" help menu item, but I'm not sure where the "report a bug" link is currently buried. Can anyone else point me (us?) to that?
Are these things occurring on newly created files using FM14?
I see "When I click on a script, it opens", but this is not "really opened", since clicking another file (which not opened yet) replace the tab, AKA close without manually closing. Seems some sort of "showing contents" for help selecting script to open.
read the same report in a German language FileMaker forum - so it´s not only you.