Mono amps and different length speaker cables

Isn't the goal to eliminate as many possible factors for higher quality sound?

That's one possible goal; another is to create a musically satisfying system that successfully conveys the artist's intent, recognizing that there is an unbreachable, qualitative chasm between the best reproduction of a recording of a musical "event" and the original musical event.

I apologize for not weighing in after starting the thread... family stuff that took me out of town. Anyway, I appreciate all of the comments and I should have been clearer in my initial description. I am bi-wiring from a set up mono amps (Jeff Rowland 725) to YG Acoustics Kipod speakers with the passive bass module. I have the shorter run (2 mtr) going to the bass module and the longer run (3 mtr) going to the mid-range with jumpers to the tweeters. I hear no difference between the sound of the speakers in this configuration, just wasn't sure if there might be long term damage from the length difference to crossover components or drivers due to the mysteries (at least to me) of electron flow; impedance, resistance, etc. Hard to imagine there would be. On another matter, the outside covering of the longer pair is a slightly lighter shade of gray than the shorter pair. Should I be worried? Thanks again for everyone's help in this matter.

No damage. If you don't hear it leave it. As for the "another matter" - if you don't hear it leave it and don't worry.