is this a glitch

[Sike]

i had picked up a molotov the round prior and bought out on grenades and wound up carrying 4 types of grenades and was able to use all of them

 

[RedDragonKnight]

competitive ruleset allows 4 grenades with up to 2 flashbangs. Casual only allows 3 with 1 flashbang.

 

[Spook the Crow]

competitive ruleset allows 4 grenades with up to 2 flashbangs. Casual only allows 3 with 1 flashbang.

^ This.

Basically, you can have these types of grenade setups (when fully bought out)

2 Flashes. 1 HE, 1 Smoke
2 Flashes, 1 HE, 1 Decoy
2 Flashes, 1 HE, 1 Molotov/Incendiary
1 Flash, 1 HE, 1 Smoke, 1 Decoy
1 Flash, 1 HE, 1 Smoke, 1 Molotov/Incendiary
1 Flash, 1 HE, 1 Molotov/Incendiary, 1 Decoy
1 Flash, 1 Smoke, 1 Molotov/Incendiary, 1 Decoy
1 HE, 1 Molotov/Incendiary, 1 Decoy, 1 Smoke

 

[Sike]

oh i see that makes sense