I can't reproduce this bug, maybe because I have no submissions before 2010.
Could you check, if the probable bug is "submission before ???? can't be read", where you could find an approximate date.
Could you check too, if those submissions can't be seen in the problem, and your status page...
Just some suggestions, as I can't reproduce the bug.
Many thanks for your help.
When experiments done, you should send al that to contact@spoj.com
Many thanks again, in advance.