Just in case this helps while you fix these issues, in regards to the anamorphic issue, I did use IFOedit to fix the 16:9 flag in the vts_02_0.IFO file (which is the movie itself), and also in the VIDEO_TS.IFO file. It just took a second. But, there wasn't anything I could do with the vts_01_0.IFO file (the menu screen and stills) because:
If I make no changes to vts_01_0.IFO, then the menu screens are not displayed properly on a 4:3 set, because of the anamorphic issue. All the menu screens are squished, including the "warp" transition, but the publicity stills are actually correct.
If I fix the 16:9 flag in that file, then the menus will be in the 16:9 aspect ratio (which is the ratio they are made for), as well as the "warp" transition, but then the publicity stills are displayed incorrectly (it seems the stills need to play as 4:3, not 16:9). I can't fix the menus without messing up the stills, because they are all contained on vts_01_0. So its a choice of either having the menus display incorrectly, or the stills display incorrectly. Ideally, the menus, stills, and the warp transition should all be done in 4:3, not 16:9, as most dvds are done. That way the menus can be displayed as 4:3 like normal dvds, and then the actual feature will be anamorphic 16:9.
Hope this makes some sense.