if you dismiss a ship, any ship your active ship may change *slots* and use what was saved for that slot instead = screwed up power bar
as long as your powers are slotted somewhere in the power bar they will not appear on their own.
if you just remove them they will appear again in a random free slot.
best thing to do with powers that you don't want to see is to slot them in row 4 - 10 and only use rows 1 - 3
the removed BOff powers, and that we all had to re-slot them one time and one time only, was because of a patch that fixed a Season 7 error.
My ground skills are shifting around. But only ones that come from devices or armor set bonuses, so it's easy to fix each login.
Not sure why, though. I don't recall this happening each time I logged in on a character. However, the last thing that was happening to me ended up being a UI change I hadn't realized happened, so I don't know if I have a real problem or am just missing something.