Well it depends on what website you use. Some websites divide by season, so episode 28 of season 4 could also be episode 134 (I'm just making up numbers). Other websites use episodes that were shipped directly out of Japan, but were not aired in the USA, so if you watch English Dubbed or Subbed, they might have "bonus episodes" there was one episode where this guy had a gun, and that wasn't aired in the USA because of these stupid group of censorship people. So yeah but the numbering is normal like 1,2,3,4,5,6...etc