I left no comment at all. Remember - you experience may vary. Good luck! I hope you learned your lesson, I definitely did.
The satisfaction of judgment just tells the court that the issue is satisfied, so they can't later pursue you for the difference between what you paid and the full judgment amount. To get the judgment vacated is another thing entirely, you need to have a good reason such as improper service. Alternatively if the plaintiff is willing to vacate, they can send you a Stipulation to Vacate Judgment. A paper the plaintiff has to sign that basically states they agree to have the judgment vacated, you also sign it and then submit it to the court clerk for the vacatur.
No they can't sue you for any amount related to this issue because you asked for vacatur, legally you satisfied the judgment so the issue is closed from further legal action.