In fairness, the carrying around 3 belts thing fits perfectly in Jeff's explanation if you factor in the assumption that Tony just loves his belts and doesn't want to retire one visually lol
Usually both lineages don't merge in unification tho, I agree they should, but sadly one of both is always retired officially and the actual lineage continues as one or a new belt. WWE was actually doing it the first way after Cody beat Roman, still recognizing him as both champs just with one belt, but then they retconned it for the Cena record to not be confusing to be the same as usual lol can't say I blame them in that case tho, it was a mess