Not that it matters to how you feel, but those are probably PACs rather than PVCs. PACs originate in the atria while PVCs originate in the ventricles.
They're not really a result of your ablation. They're caused by the same mechanism that caused your AF; ie, cells in your atria are firing when they shouldn't. It's just that now that you've had an ablation, it's preventing those PACs from turning into an AF episode like they would have in the past. So, yeah, I know how annoying they can be, but every time you feel one just thank your ablation for preventing the AF episode that probably would have resulted.
It's quite possible they'll settle down and become less frequent over the coming months.