Uhhh so recently i was the server riding the skelly horses near spawn for fun. i had a saddle so i put it on the skelly horse, after a while i got off of it to relog because i was apparently invisible at the time. When i get back on and as soon as i sit on the skelly horse (still had its saddle on) i was disconnected apparently for the following reason, hopefully i remembered this correctly. i was disconnected because "Flying is not enabled on this server" it was something along those lines. Anyways, long story short should i be worried about this?

No.
This is fine.

That happens to me once in a blue moon.

iit happened when i was dancing at spawn.