more than likely what your problem is is the data table
I had a similiar issue because we had a huge bug where an e-mail was submiting and resubmitting itself which led to our parser log table to go from 3 megs to 1.3 gigs in about 1 day. I had to sweep to log and clean it out. More than likely you have sweeped your "swparserlogs" but didn't sweep the "swparserlogsdata" table. So now you have swparserlogs creating new entries and probably linking up correctly. I'm not positive, and its just a suggestion, ours seems to have linked up ok, but you never know

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hope this helps.