Thanks for the advice everyone. Yeah, I kind of screwed up my mileage accumulation.

It looks DL is not the hottest program. There aren't any other U.S. domestic carriers in SkyTeam either. I will hold onto the DL points and add to them when I am forced to fly DL.

I will try to combine the rest of my miles into the US program. I often end up on US or UA when I can't fly SWA.