Front Drum Brake Issues

You still haven't saod what rubs what and at what location.
All I know at this point is you have added grease where there isn't supposed to be any. The only places where any type of lubricant is applied is the small rub pads stamped in the backing plate and inside the free rotating cap of the adjuster.
Grease anywhere else in there will collect brake lining material which could create a problem.
This is just a wild guess but if the outer edge of the linings is rubbing at the bottom of the drum, this is somewhat typical of aftermarket drums and linings.
Actually , Its common for the backing plate of a disc brake linings to need a bit of file fitting also, less it would drag in the guides.
The only place where I've picked up either type of brake linings that fit perfectly time after time was the parts counter at the Ford dealership I worked for.
Yes they charged a premium for there parts but the quality control they demand in their replacement parts justified it.