danny the post you quoted is the guy asking for multiboards for each player, this is not the same and has a defrent and easyer answer.
Yes you can have 2 multi boards at once, just make 2 varibles (Multiboard) and when you first create the multi board add set Multi_1 to last created multi board, then do the same for the 2nd board but Multi_2 instead of 1.
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.