K2 mapping! leds sharing layers?

Hi , i've recently upgraded from an allen and heath 3d and audio 10 for a pair of K2's and dn-x1600, I've only really tweaked my map aver last couple of years, i'd say I'm at an intermediate level with mapping.

My question is I'm looking to set my own latching layer system with the modifiers so i can customise the led colours in my map, but I'm really struggling to figure it out, I'm having a few problems with the led's as well mainly if i set up a shift button when i press it i would like any led's that would be making way for the next layer to disappear, for example if i had a row of buttons for play,cue, ect but also wanted the same row for hot cues when i press shift, mapping the function is fine i just can't seem to get the less to disappear!!

that probably just sounds like its been written by a mentalist any help would be grateful as my laptop is about to go flying out the window!!!