Wrong survival scores for some pairings

I was browsing LiteRumble and noticed the survival scores between Combat and LifelongObsession, FloodSonnet, HariSeldon, Prophet, RCBot are abnormally low.

If you look the opposite scores in the 5 opponent profiles, they are also low.

Ran the battles locally and the scores don't match.

Most likely the version of Robocode the server allows is out of date

The server doesn't use Robocode. It simply processes battle results sent by clients. Numbers from 0 to 35 in the case of survival scores.

I know the server throws results away sometimes. It records results on one side of the pairing, but not the other. In an attempt to decrease the number of database accesses and cloud service fees.

But it only reduces the amount of battles. Would explain a low number of battles, but not low scores on all battles.

Ran the battles locally using 1.9.2.3. Still the scores don't match.

Combat can work with much older versions too.

But why wrong scores with only a few pairings? Version issues usually affect the whole ranking.