Wheel alignments are the biggest scam going!
Sounds like you need to go somewhere a bit more reputable and find someone you feel comfortable with and explain your problems to.
If all else fails get the guy to actually go for a drive around the block (with you in the car of course) so he can experience it himself.
It's very hard to know what it is without looking at it and experiencing it first hand. I'd say most of the potential problems have been listed here. I would say it's nothing major, but get it sorted before you get new rubber otherwise you will chew through that the tyre on the problem wheel.
