i did the same,

linked account 1 ---> account 5

but then forgot that account 1 had my boosting pally on it.

sooooooo i just moved my pally from account 1 to account 3. problem solved.

accounts 2 and 4 are not touched. the only thing that i have a problem with now... is that i have 2 accounts that are linked and another 2 that are not. So it kinda kills my whole "boosting 4 toons with one 70 at the same time thing". obviously 2 accounts are going to be left behind because they aren't getting the 3x xp bonus. Oh well!