I'll bet it makes beer . Seriously, don't worry too much about overshooting temps, so long as you don't go over about 168 where you start extracting tannins. Just get it to your target temps and start counting time there. Did you get your OG? If you didn't have to add extra Extract, then you were on about where you should have been w/ the PM part, and that should indicate you did okay. If its taking a long time to cool, you need to invest in a wort chiller. They make your brew day so much faster. Pitching a bit high isn't advised, as it can stress the yeast and create off flavors, but ultimately as you see, yeast is pretty hardy stuff and works its magic anyway. I bet you'll have a damn good beer.