Clan Win/Loss Error?

My clan did quite a bit of CW this past wkd and I noticed that our win/loss ratio was messed up. We were 60-35 before the weekend and now we're 69-62. However the fact is is we won the majority of our matchups. I looked in the matches history and many of our wins were determined as "ties". However, also looking at the the matches, we won the majority (like I said) and lost very few. Did the win/loses get mixed around? This has happened before but not on a mass scale like this. Anyone else getting this?