How many times can/should you unmount/remount wheels using the same tires. I have had 3 sets of wheels on the same tires and looking at number 4. I really dont want to screw mine tires up a I have alot of tread life left.

 

Start driving more and adding camber, than you won't have this issue.

You're fine, tires are luckily made from rubber so they spring back to shape. If any piece of rubber falls outta the bead though then it's pretty close to the end of those tires.