Yes, multiple times - 3 seismics. It was recently changed, when mortar/rpg spawn amounts were changed, nades were changed too.
Considering I looked in the scripts and it's 2 grenades, I find this impossible unless it's a server-side script change. Then again, I can't actually play the game due to a SetupArrayProps_R error.
You mean this?: I don't check scripts or know anything about them, but from what I can tell, that looks like you probably get 2 nades default ammo then a +1 seismic? That's the kinda sense I can make out of it, but I can tell you that in 2.25 testing through to the release, it's been 3.