Usually the ablation stops the unwanted arrhythmia, but flutter is one example that can be 'substituted' when an ablation is performed for AF (atrial fibrillation). Also, you can get PACs resulting from an ablation, and yes, SVT as well. It is usually the fault of insufficient mapping in my opinion, although the electrophysiologist who performed your procedure might disagree with me, maybe even for very good reasons.

Over on afibbers.org, we stress constantly that one must do research to find the very best, most experienced, and most skilled EP in one's area, even if one must travel for up to a day. Just as there are mediocre teachers and piano players, there are mediocre EPs.