Hi it was just inside the border actually on my side though, literally on the dividing line. The second planet was next to that one but a few hexes inside as well. It shows my influence to be about 50%/48% in that area, one hex next to the planet but inside my zone is 48%/48% though.

Should this still be happening then?

Hi it was invaded by a faction I was at war with. They attacked it, and then immediately after the 'DEFEAT' message the friendly neighbouring faction's flag was shown over it.

I watched the whole thing happen, it was a seamless transfer. It was as if the friendly had been the one invading themselves but they weren't.

They were 16 land 25 level Planets as well.