hi Cyan!PMs are restored progressively as it takes a lot of time to convert them.
As now it's using a conversation mode (like a forum's thread), all old sent and received message will be converted as their own thread's first post.
My PMs are restored up to July 2011, so you should have recovered all of your old messages in few hours.
yeah, it has to be thatOr it could be message you received but that the sender deleted. (it's more likely that )