Started a new GC yesterday, I've no idea what is going on with battles now

[easytarget]

I've not played the GC in months and months, got to be 7 or 8 patches since then. Figured I'd go take a look again.

I'm immediately confused and don't know what to make of what I've encountered in my first two battles, I ignored it the first time, but twice means this can't be a mistake and something I guess has been changed and honestly I don't know what to make of it.

I've got an army of 14 units, it was probably more like 10 the first time this happened. I engaged the enemy, went into battle, and what to I see? Half my army shows up on the battle line and the rest come in as reinforcements behind me and slightly to the right as you face the enemy.

I find this completely bizarre for a couple reasons. 1. It appears to make the auto-calculation such that there's simply no way to use it now, I have to fight the battle since the AI now thinks I have half the forces I actually do. and 2. This makes setting up for the battle completely F'd up, as half my forces, not of my choosing which ones since I had no say in the matter, now start behind me and I'm forced to march them up to the line or march the front line back, not to mention shuffle who goes where.

Seeing this twice in a row I conclude this isn't an anomaly and apparently some game mechanic has been introduced in the patches since I last played which I have no clear understanding of and need to sort out.

Please tell me what's going on here and how I make it so my entire army shows up all at once when engaging the enemy. The first engagement I initiated and the second one the AI initiated, stance was normal in both.

What's going on here guys?