If they are making phone calls then they are definitely oversampling the registered libertarians and/or “unaffiliated” voters. There is no way that Ron Paul would poll that well in any realistic poll of GOP primary voters in Texas.
The registered libertarians?
Well. I’m not saying this is a great poll. It says 882 active Republican voters. I don’t know what that means exactly. I don’t see any crosstabs or anything. I’m not saying “this poll is right”, but I don’t see anything really wrong with it either. It’s not a Zogby poll, though.