Dollar Tree

I was in line paying for my products and ask you clerk/store manager to double my bag because the water was heavy and had busted the bag before, he caught an attitude right away, his whole demeanor changed he started saying that he only doing what he was told which was ok but I still insisted that he double my bags of water, he got even more furious with and went over to the next counter and talk to a clerk coming back to me saying each bag will hold up to 8 pounds, I still did not want to double my bag, I come into this location at least 4 to 6 times out of a week and have never had this problem, look like he was high, but I don't know for sure, a simple thing such as doubling a bag should not have escalated in the way that it did, I am a veteran of the armed forces and I try to treat everyone with respect. I could not believe that this happened over a little thing such as a bag.