Okay had a look at the Remastered Season 1 discs 1 and 2 in VLC player. Deinterlace is off. I don't see anything like you saw with the frames merged together. The animation frame-to-frame looks "whole" to me, no ghosting/blurring that I can see in each scenes I looked at (including transformations and that same Jazz scene). Each frame looks like a complete animation frame, like you could screenshot it and it look right.

Codec information from VLC says:
MPEG-1/2 Video (mpgv)
Res 720 x 576
Frame rate: 50
Decoded format: Planar 4:2:0 YUB