MC 1.16.5
Forge 36.0.48
Enhanced Celestials 1.0.1-1.16.4
Torchmaster 2.3.6

When a Blood Moon occurs mobs are ignoring things that prevent mobs from spawning in areas: Mega Torch from Torchmaster prevents mobs from spawning within 64 block radius by default, however this still happens:

I doubt this heavily as all i do in EC is mixin the value of the spawn cap(just change the number). If they do other stuff away from the spawn cap that's a pretty big issue

The issue isn't the amount of mobs, but rather that they are spawning in areas where they should not be spawning.

No it doesn't, all i do is modify the spawn cap, nothing else.