LOL. sounds like you are riding that thing hard. good for you. Outlook is a decent bike and $150 is a nice price. Your rim may be bent or your brake tension is off center. either way, take it back to the shop. it is perfectly normal for wheels to go a little out of true after the first hard ride. as things settle, the bike will need to be tweaked, it is perfectly normal. also, set height is dependant on how rough the trail is. on smooth trails you want your seat up to the point where you have a tiny bend in your knee when the pedal is at 6 oclock. rougher trails, seat goes lower so that you have more room to shift around