Year range Winsome Witch

Currently, the year range for Winsome Witch (https://www.imdb.com/title/tt8832048/reference/) is listed as 1965-1967. 

However, as you can see, all episodes listed on IMDb are from 1965 or 1966. 

The Big Cartoon Database also only lists episodes from 1965 and 1966: https://archive.ph/20120630142820/http://www.bcdb.com/cartoons/Hanna-Barbera_Studios/A-C/The_Atom_Ant__047_Secret_Squirrel_Show/Winsome_Witch/index.html 

TVDB also states it ran from 1965-1966: https://thetvdb.com/series/winsome-witch 

And so does epguides.com: https://epguides.com/WinsomeWitch/ 

Can a staffer correct this please?