Case #1 - looks like the moderator of that community doesn’t think the headline fits the sub. I don’t get any particular sense that the reason for removal was in any way political.
Case #2 - as the moderator explained, the auto moderator on Lemmy is basically still in beta stage and is still very much a work in progress.
In both cases, it seems you got a fair explanation as to what happened to your posts. I think it’s a bit premature to start making accusations of some kind of political conspiracy about this instance in general.