I'm not understanding your comment on ardilla's offer for Collison. Greyone officially signed him to a 7 day last Sunday? That's when he made the post. So he has to drop him (in Yahoo) today as well. That will be one week's worth of ownership.
Meaning: If he claimed him on a 7 day on Sunday (the 31st), that means he picked him up and could play him on Monday (the 1st).
If he doesn't drop him today in Yahoo (in theory), he'll have the ability to play Collison on Monday (the 8th) as well. That's 8 days of ownership.
I'm not understanding why ardillas' offer was invalid.