Odd Incident - Memmy or a glitch in the Fediverse

I just tried to post something to a community on Feddit.UK; I managed to submit it to the wrong one (an unrelated Lemmy.ml community) twice via the Memmy app. In the end I logged into the website, whereupon it was possible to post in the right place after a number of error messages.

I’m quite certain that the correct community was selected in Memmy. The community that I inadvertently spammed was alphabetically before, but not the one immediately above, which is interesting.

Has anyone else experienced this?

It’s possibly a glitch.

I’m open to the possibility that I’ve been an idiot, but twice?

Thoughts please.