Conjuring monsters/scripts/I dunno

Hi guys. I'm currently using:

Monster Mod http://skyrim.nexusmods.com/mods/35631//?

Monster Wars http://skyrim.nexusmods.com/mods/18997//?

MM Addons http://skyrim.nexusmods.com/mods/14767//?

And... MM Conjuring http://skyrim.nexusmods.com/mods/15011//?

Some of the conjuring spells wont work and I've kind of deduced what's going on but I don't know how to fix it. There are several beasts that absolutely wont summon unless you're standing in a very particular place near a very particular patch/type of ground. It's like the spell thinks that about 90% of summonable locations are illegal or invalid unless you just so happen to fire the spell at that one particular spot on the ground. Once the critter is actually summoned, everything works out just fine but actually successfully calling it forward is the trouble.

Any thoughts? How can I fix this/make the spell more tolerant of ground types to summon on?

The problem is here at http://youtu.be/rLh-B7Isa8U

Here's a video of the exact issue. See how it deviates to very specific coordinates? The monsters' entries in the mod look alright when I open it with the creation kit.. Could it be a physical model issue? It's bizarre how some monsters are called up and others only like very very specific terrain.