When I earn a UAV , die, then earn another UAV without using the first one I earned, I end up only having one UAV, why is it?? I thought killstreaks are suppose to stack, and it happens even in the same life and when using the Support strike package. I also saw one time that a tip said that killstreaks stack, so you don't need to worry about losing your killsteaks.
No stacking. You better use it or lose it (kind of). This has happened to me several times.
Only your fourth slot stacks. so if you use 2 care packages or emergency air drop etc, you will not lose any of them untill used