The first season has only 6 episodes. The first 2 episodes listed by TVDB were in reality one single double-length episode as you can see here and here. as well as in this snippet of a March 4, 1992 newspaper.

Concerning the 3rd season,

• the 8 first episodes listed are in fact 4 TV movies that were broadcasted on "The Family Channel" after the series has ended as it is explained here. These TV movies are listed in the movies part of our database.
• the 4 last "episodes" (sic!) listed were supplementary parts that have been filmed soecially to be included in the movies version of the series as it is explained here. They were never released separately and, consequently, should not be listed in our database.

Reminder ; TVDB is not an official source.