Quote Originally Posted by Sdragon
Pretty much what I meant. Get Hastati, Principe and Late Triarii in even numbers and you get the chessboard effect. Stray too far from what it wants and you'll run the risk of none faction formation. Not sure if it was your screen shot but I saw a funky arrow head formation when tried with the later legions, which is a Galic formation I think.
It was not my screensho but I have tested it just yet with:
1 general
10 Cohortes Marian
2 Gallic auxilia cavalry
And I got my soldiers spreaded in an arrow as formation. But the buttons go on being the vanilla ones, I will try more. I think that formations should be chosen by the faction not by the troops recluted as it has bad results at the moment, I don´t know if it is harcoded.