I rejected it because, if I recall correctly, it was submitted as a variant of Gears Ultimate. I said compilations are treated as separate titles (I think I can't really word it clearly). For example, JetSet Radio Future and Sega GT double pack is its own thing instead of two variants of those games.
Ahh yes, fair enough. As the honourable gentleman has stated here compilations get added as if they were a unique game.
It’s good practice to add the individual games as related games where they were released individually but this is by no means essential.