I noticed there was 2 games within Konami e-amusement redump. Why are these two games part of the e-amusement lineup when there is over 50 games currently using e-amusement in arcades by Konami?

I have a theory but I was wondering what your explanation is. These games most likely had a midlife software and hardware update to connect to Konami's proprietary online service (e-amusement), whereas other Konami games eventually changed on release date.

Even then, e-amusement is not a board to run a game. It is simply an online service for the game.