15 years with the wrong belt routing

Can't imagine a motor home without AC! It's great that you still have the car and are still making it better! Make sure that the top of your alternator belt is not hitting one of the reinforcement ribs on the snout of the water pump. If it is you can grind away what is interfering on one rib with no concerns.

That is a three groove pulley btw. And as far far as I know nothing was damaging the belts. I got a lot of years on those old belts and the only reason I’m replacing them is to be proactive. They still look fine.