Thanks Lord Foul I missed that. I've updated my notes properly to reflect my previous ruling and added the write up to the character thread. that way i should refence it properly.
So Rowan would have got that extra attack. Which means he would have a spare AoO. To make it easier to retcon, Let's just say he did it to the one who is running on the trial(It was close enough). I rolled a 23 (19+4) to hit and then a 17(10+3+4) str vs the 16(19+1-4) dex. so that goblin is tripped.
Billie can do a second move action in place of a standard one to keep up with goblin withdrawing. so no issue there.