BB Bold 9650 :: Old And Duplicate Emails Being Pushed?

When I set up email on the device, I began receiving new email, but not old unopened stuff that was sitting in my inbox. I didn't worry about it because I really didn't want to have to sift through mail that I would have opened already if it were important. Then I went on the BB website and validated my accounts (That step isn't in the set-up instructions, and I didn't initially realize that it was necessary.), and now that old email is being pushed. Some of it has already been opened, so I'm not sure why it's being sent again, but my chief concern is the sheer volume of it. I have over 1500 unopened messages going back a few years, and I certainly don't want all of them dropping onto my BB. So far, I've had two dumps of about 75 messages each-- one yesterday after I visited the BB website, and another when I turned on my device this morning. Is there a way to limit the number that will be pushed, or set a time limit so that I don't get messages that have been sitting on the server for years? The other problem is, they aren't sorting by date of original delivery, so my BB inbox is currently a mess. When I set up my previous BB, I remember getting old, unopened mail, but I thought that it was sorted by date on the device, no?