In pulling together a "things that drive me nuts" post, one of the items in the list was "Lopsided Rear Ranks." The above unit's an example of this: the models in its rear rank aren't centered across the unit.
When I'd see this, I'd say something like, "Come on, man; you've got to center your rear rank. It matters for supporting attacks, templates, charges. You're just supposed to be centered."
Well, as it turns out I was totally wrong.
Removing Casualties (pg 5)You only have to start keeping things centered when you're down to a single rank; until then you can pull from wherever the heck you'd like. So, the above formation is just fine.
Some of the models in a unit (probably quite a lot of them) will die as the battle progresses. When casualties occur, models are removed from the back rank of the unit. If the unit is reduced to a single rank, casualties must be removed evenly from either end of the line.
I imagine that means that if you want to shift guys to the left or right (without being charged in the flank), you probably need to make a Combat Reform test, but still...
Anyway, I just learned something new and I'd been doing something wrong: of course I had to share it.