Ammo Bug?

There seems to be either a bug that when you stack a certain amount of ammo you lose a whole whack of it...

Once I bought a huge amount of ammo, I kept buying it just cause I was bored and thought I'd stock up. I had about 65K rounds in my inventory and bough another 20K rounds, when I merged the two, the ammo count went back to 6-7K rounds, as much as I could try, the rest of it had just dissappeared.

This happened to anyone else? And yes I realize it may seem idiotic to stock up on so much ammo, but hey, still shouldn't make it all dissapear just like that!

Yeah the very same thing happenend to me- I wanted to see how long it took me to click 100k rounds, hehe .. I had about 10k in my inv allready, added another 103k, and when they combined.. Whoof- I got 37k... oh well.