Something bizarre is going on regardless.

IF records are being removed for inactivity,it would seem that the cut off point is roughly 10 -12 weeks inactivity before your records are removed.
I'm basing that on Larikums last activity here [he only posted here over 4 days then stopped]

I wanted to check something in the records but I haven't been able to get online,I've been getting a "An error has occurred whilst Logging into the WipEout HD servers,This account is already logged in",I have no idea what that's all about unless my PSN id has been stolen and being used,can't get into HOME either.

My view on the whole matter is unless a record can be proven to have been made via "Cheating or Technical error [1 sec lap times etc]" they should stay.

You don't get the Olympics scrubbing the record for the 100 m every 8 years,why should Wipeout have a perpetually changing records board,makes the whole thing rather pointless.