you are right! I just checked we had 17 blocks found on 7/23 which would be at minimum 425 (more with the fees added in) yet slush graph says 294... it probably didn't account for all those "processing..." blocks that had that problem earlier...

I wonder if those blocks that were slow to process will be added on to 7/24 average or if they will just be dropped from the graphs entirely....

I wonder if luck% was also bugged cause after those blocks processed luck fell from 172% to 99% or something...