The G-Meister
Giga Slime
It's possible for the game to spawn enemies over the cap of enemies for an area if the algorithm spawns two enemies within seems like the same frame. This area has a cap of 3 normally, only spawning Jumpkins:
The area was where I happened to be grinding when I noticed it fairly often. I've had the last two spawns be both jumpkins, both jack o' lanterns or one of each - unfortunately no screenshots of either though. Cap of 3.
This area has a cap of 6 when you let them spawn slowly, yet it very often goes up to seven when they're spawning quickly. The best way to test is to kill one of them and see if another respawns:
The area was where I happened to be grinding when I noticed it fairly often. I've had the last two spawns be both jumpkins, both jack o' lanterns or one of each - unfortunately no screenshots of either though. Cap of 3.
This area has a cap of 6 when you let them spawn slowly, yet it very often goes up to seven when they're spawning quickly. The best way to test is to kill one of them and see if another respawns: