Looking at https://stackoverflow.com/questions/tagged/php?page=1&sort=votes&pagesize=50
It starts off sensible but the last few questions have single digits vote, the last one being 0. The first item on page 2 has 142 votes.
Votes drop off suddenly:
Note sure if this is tag-specific. The c# tag looks fine (clearly receiving preferential treatment :p), but sql and php are bugged.