I don't quite understand your need to have 2 of everything but that's OK.
It's not really a need. It's just something I like to do. I think my primary desire stems from just wanting to take one gun to the range to use and use and use, and have the other be a safe queen (maybe to pass on later in life to my children). Or if I eventually have 2 kids later on in life, they'd both get identical collections.... etc. It's all nonsense in reality, but it satisfies my quirky itch.