Welcome to War & conquest – I also answered your other post in the QRC section
1 – If the Romans are not in the woods, they are not disordered and get their bonuses. I acknowledge that in some cases there is a discussion if one model is in the wood and the rest are not, what should apply but being strict about it, thats the rule.
2 – Just use b
Hope those answers help
any others questions feel free to ask and do let us know how the battles went