Some of the custom abilities (the strikes and charges) are replaced with their Core-Spore counterparts. A similar bug was in DI 9, but instead the same abilities didn't appear at all.
I am using the latest version of DI 9.r on the Steam version (it has no mod issues, despite what people say), I have it patched it to 1.5.1 and I use both expansions. I don't have any other overhaul mods.
EDIT: So spits work even though it treats them like the core abilities in the editor. The strikes and charges don't work period, though.