There are two problems connected with the distance of characters from the each other.
- First is obvious bug. If you separate one character from the party _and moving_ after that (no matter how far, several steps will work too), you cannot connect him to party as first character anymore (First in list, I mean). System says "party is too far". Connecting him as second or any other works perfectly.
I must notice that bug fired _only_ if this character precedes party that he tries to lead. If character icon placed under party list, it can be joined in any place - leader included.
- Second can be the bug or not. Spell "Cure Wounds" cannot be used on the others in the "square" formation (only one that I really used) - it always fails with "target is too far" message. Curiously enough, if characters breaks formation (any movement was enough for me), spell works perfectly. Maybe it's really too far distance from companions in this formation, I dunno.