Bug creating time signatures in previous bars

I notice the following:

create a 4/4 signature on bar 94
create a 3/4 time sig. on bar 93 > it gets created on bar 92 !!

The other way around works. See gif

Is Insert mode active?

no it is not active.
Side note: is there a counterpart of INSERT? It seems I can delete but the following notes stay on place

This is happening because Dorico won’t delete beats when changing a time signature. If you reduce the bar to 3/4, the extra beats have to go somewhere before the next time change, so it creates an additional bar to put them in.

Yes, to be clear: this is not a bug.

see also

you get used to it after a few times :slight_smile: