Solo or co-op?
Could you tell me more about the error?
In co-op. That happened after restarting map. When i respawned, i had just a pistol.Then i bought Commando on the wall, took Olympia from the Box and i choose M1911 to replacing. But i observed that i got 3 guns, M1911 didn't replace to Olympia. Then i bought from the Box M16 and Ray Gun, so i could choose between that 5 guns. I didn't bought more guns after that, but i suppose i could take more and more guns 8)
Hope it'll be helpful!