Desktop Restore Overwrote existing memos in MemoPad.

I was trying to bring over some old Memopad notes from my old Blackberry 9630. I did a backup of the old device using Blackberry Desktop Software (the new version, v7), and then I used "restore" function and chose the Memos to bring these old memos only to the new device (Blackberry 9330). The memos were ported to 9330, but the few memos I already had on 9330 are now gone. Is there any way to recover them? Each of these pre-existing memos on 9330 had a different title from the memos I was bringing over from 9630.

PS I had thought that Desktop is smart not to overwite the enitre population of memos that already existed on 9330