Is there a way to separate and organize units more efficiently?

Just like the title says, I've been running into a problem every single time I enter any battles whatsoever, where it's either troops I have currently, or new troops that I just hired, will automatically cluster into one unit group regardless of what specification I have that unit group set as.
Most commonly, every infantry unit I use (I.E. my Aserai axeman) will just automatically move into the infantry grouping that I have set as shields, even though I have taken so much time to try and move the correct troops into the unit groups I want them in. It happens every single time I enter the prep phase of any battle, along with the units won't stay in the formations I had them in during the prep phase, and will revert back to the line formation when I start the battle.

Is there like a mod, or something I can do in game that would fix this? Cause I'm starting to get a bit pissed over this entire thing.

submitted by /u/TheOriginalH1h
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