Advogato Import

I used mostly the default settings for the Advogato Import module, and set up my user account with the right user name, but every time I run the cron job I get multiple posts from Dec. 31, 1969.
I was unaware as to what values to use for the START ENTRY and END ENTRY values in the USER ACCOUNT > ADVOGATO IMPORT options, so I used 0, 9999 the first time, and ran the cron job and only seemed to obtain the Dec. 31 posts, and then changed it to 0, 0 to try and only get my first post. I got my first post but every time I run the cron job I still get the Dec. 31 posts coming up again.
Can anyone help me fix this (via cron files or the Advogato Import interface or anything of the sort)?
Thank you very much.