When I attended meetings years ago, if a brother or sister got DF'd they weren't supposed to come back to their meetings right away even if they wanted to repent....
If I remeber well, you had to stay away from the meetings for a few months and them come back if you wished, as if to show that you made changes in your lifestyle and then decided to come back.
If you were disfellowshipped and went back to the meetings right after, it was a sign that you didn't understand what happened to you and you weren't trying to fix what you did wrong.
Maybe it was different in other congregations.