Question for Pose creators

I've been having a difficult time making sure that in group poses my sims are looking in the same direction. I've tried every trick I can come up with, have googled it, etc. but without a fail - and even if in Blender they seem to be looking in the same direction - when I test the pose in game, they eyes or heads are always slightly off.

Is there a specific thing that needs to be done to make sure this doesn't happen?

Thanks so much!