I have same issue, since this thread is already started ill just put it here...
1) Formations for me dont work at all with PBOD. in battle i can *sometimes* get divisions into formation. typically only archers, into ranks (why ranks is actually just one huge long line though...sorta makes it pointless...id rather have them actually form RANKS, not just one long line).
2) shield wall has never worked, ive tried everything possible. F1-hold to reposition them, F1-F1 to hold position...tried it with pike infantry, shield infantry, even cavalry and horse archers and my companions. never seen it work.
3) square formation works once in awhile with infantry. but doesnt seem to help them much as half the troops turn their backs to the front and they dont defend themselves when standing in formation.
4) when using PBOD, as i said formations do not work at all, ive tried every possible variation, the only result is that troops immidiately start to hold up their shields and move backwards, spamming all troops into the back "wall" and they still keep trying to move backwards, even though they have their backs up against the zone-wall. they dont attack, they dont shoot missiles, and if i leave them like that until the enemy gets to them, they dont even defend themselves. -- so anyway, i dont use formations in PBOD, but sometimes i use "stand closer" or "spread apart", and the "forward 10" or "back 10"....but most often when i use "forward 10", it actually moves the troops BACK and "back 10" also moves the troops back.
so the only functionality i have out of PBOD currently is that i have archers move "back 10" (or "forward 10" as it doesnt appear to matter) which makes them go behind the infantry.
that is, realistically, the only thing pbod does for me, i cant get anything else to work.
ive read your replies here too and tried out the F1 flag repositioning, but doesnt work either.
all the posts by the people in this thread are the same issues im having, i know exactly what theyre talking about because same behaviour i have.
maybe theres a trick that i havent figured out yet but none of what has been said in this thread changes the behaviour at all for me.
not sure what else i can give you to make my feedback more helpful....im using floris 2.41a bugfix patch with expanded...and umm....yes i also use different divisions and select the divisions 1 by 1 to give orders. generally i use archers, cavalry, infantry, companions, and spears / horse archers if my army has them.
i do sometimes get the message that i dont have enough of a specific troop type to form a formation, but other than that, when i do have enough, the formations simply dont work...except for ranks...but it makes my archers spread out into such a long line that from one end to the other, the archers are nowhere near eachother. id much rather have archer ranks formation actually make them form ranks...like 3-deep ranks or something, then i could put pikes or shield infantry to guard them on front/flanks. as it is, its basically an archer firing line. it works alright too but not exactly rank formation.
maybe i can make some videos, then you can see the behaviour im talking about, and maybe know what im doing wrong or what to fix.
let me know if that would help.