Is this a glitch? I am confused?

No. The editors/drawers changed a few of the Enchantix transformations during the show. Like with Tecna's, in the show it's mainly purple and she has only one set of wings, while in the official fan-art, there's more green and she has bigger wings. I don't know why this happens, it just does. (Mainly with Enchantix though, out of all the transformations) But, it has happened with the Sirenix transformations. The colors in the 2D drawing of the girls' outfits a quite different from the actual 3D outfits in the show.

That is not a glitch. Yo see, Aisha's Enchantix color palette changed from blue to green when Bloom's Enchantix was first introduced.