Why so many balanced output? Is your source just balanced so it’s more convenient for you or do you notice an improvement from the balanced connection. Out of these 9 I think 3 of then are SE, and at least 5 are balanced. Most amps will give too much power for IEMs through balanced, so volume adjustments aren’t as fine, maximum I would my IEM balanced is 30%.
Returning stuff in general hurts the seller.