My guess is the fix they just put in from the
Performance History Discrepancy thread fixed OAV, but did something weird to WHIP. Looking at the Les Webber example from that thread (since he only had 1 use), his WHIP was 1.27 and now it is showing as 3.80, exactly 3 times as high (3.8/3=1.2666667). So, it looks like all you have to do is divide by 3 to get the correct WHIP.