shock help

I have a set of Fox 2.0 with resi . front and rear on my 09ac. Hear is the problem I have had the shocks on the truck for little over a year. fist time the shocks blew had a local shop said it was cause I put shocks on and no rear lift .and that cause I had 4sandbags in. so then put a 2in aal in. and the one went again. I don't take my truck off road. I have 265/70/16 on it. I'm done with the shocks I pulled off the fronts and rear put stock back on. Has ths happend to any one. or did I just get a bad set of rear shocks

 

An AAL will not change the travel of the shocks. It will still compress the same, or extend the same distance with, or without that AAL. You most likely bottomed out the shock again after the AAL. The best thing to do would of been to add bumpstops before the shock bottoms out. Leave about 1/2" of shock shaft showing at full compression of the bump stop. I am guess the reason the stock shocks are working fine is because the fox shocks are longer than stock.