Please Square-Enix, stop doing nonsenses with the second dye channel. Change the way you're doing it! You're doing it wrong!

Remember what you said when the feature was announced:
...so you'll just have to sort of trust in the aesthetic sense of our design team to make sure that the right parts are being dyed. But even though we can't promise you'll be able to dye every single bit, we are doing our best to make sure that we are giving you the best options possible to customize your gear as much as possible and/with the greatest amount of surface area being dyed.
I'm sorry but your design team have NO aesthetic sense at this point!