aspect ratio on Warner Archive release

The Warner Archive release for Tarzan and the Trappers is widescreen. While watching the film I thought the framing looked off, especially along the bottom. In one scene, Tarzan is running across the savanna and almost completely disappears behind the bottom black bar. Afterwards, I did some research and found that this film was edited together from 3 episodes of a proposed TV series, suggesting the proper aspect ratio is full screen. I know Disney often filmed in open matte, which could be shown widescreen in theaters then full screen on TV, but this did not appear to be the case here. I posted this on the Warner Archive Facebook wall, but they deleted my post after a few days. I think Warner knows the aspect ratio is wrong but won't admit it, probably too much trouble to remaster.