Finally Playing 2 Tables - ReStart or finish both?

My first post. I've read the FAQ, and have been lurking for weeks.

I have around 300 $11 SNGs at Party (around 22% ROI). Have finally started playing 2 tables at once. Over the first 50 of them I've barely broken even. I'm re-starting a new table as soon as I bust out or win.

But I'm begining to think that, at least for a while, it might be good idea to not replace that table I just busted/won on with a new one if the other game is anywhere near the bubble.

I'm familiar with sample sizes and variance. 300 & 50 games mean nothing. I _AM_ looking for advice on "correct way" to learn 2-tabling. Options are: 1) Set my time period during which I will constantly start a new game when I bust/win, or 2) If ongoing game is on bubble, go ahead and finish that one and then start 2 fresh ones.

Thank you all in advance.