I had this same problem...
I noticed a good amount of posts that were no longer on my count...I'm pretty sure they were moved into wasteland. But on no other board are legitimate posts deducted from my count unless the thread is deleted.
This is very disheartening...because, you never know when a thread will be moved. So making a decision to improve your post count becomes a coin toss as to whether or not it remains there.
So, tell me this...what happens when someone reaches 500 posts and is able to post an avatar, then 20 of those posts gets moved to wasteland. That person legitimately made the 500 postcount, but is now only at 480 posts....does their avatar simply not work anymore?
It's been nawing at my brain for a while... just curious.
If wasteland is the equivalent to deleting, then why not just delete?