I got this question from someone which, good question, not really sure how I could answer..

I have been having some problems with my raw log files, it's been going on some time now, and I keep waiting to see if it will fix itself or stop, but it's still the same, and still useless.

Basically, my daily logs seem to always be incomplete, and cover the wrong time period, someone will spam my posting board or harass my posters, I find out, go and download my daily log, and find out it does not cover the times my board was being spammed.
Like today, someone was spamming at around the 13:00-14:00 time period, I go DL the log, and find it only starts at around 16:13, so it's useless.

Likewise with my monthly logs, they are always corrupt, and have been for some time, I ended up deleting all my back logs because they were all corrupt, I'd DL them, try and un-rar them, and get a major error, and if I tried to open the result, major corruption would be in the files, making them useless.
Suggestions ?