Reply to S4 mapping instant doubles

I just got my S4 and have been trying to learn the shortcut for "digital doubles". On the Serato / Rane 57 I have a toggle switch mapped to throw over a track to either deck quickly. Since the S4 doesnt seem to have this feature (via the controller) I mapped an possible solution thanks to this awesome site full of controllerists (thanks guys!!!). My problem is I cannot figure out how to map deck C & D with an additional modifier. Here is what I have so far.

Deck A -> B / D
LEFT SHIFT + Gain "Button Push" on corresponding deck.

Deck B -> A / C
RIGHT SHIFT + Gain "Button Push" on corresponding deck.

I made a modifier for the shift buttons to work but what I wanted to do was now add a modifier that said "if Deck D or Deck C selected send that track to corresponding decks". I tried to add but it didnt seem to work. It just ended up loading both decks.

what I was believeing was

Deck C -> B / D
Deck C selected + LEFT SHIFT + Gain "Button Push" on corresponding deck.

Deck D -> A / C
Deck D selected + LEFT SHIFT + Gain "Button Push" on corresponding deck.

Anyone got tips on how to make it work?

I did try this same thing using the CUE buttons over each track but ran into some problems I believe with the modifiers. For some reason it would end up sending the wrong track over. Same concept (SHIFT then hit a DECK cue point to send) but im new to this mapping style in Traktor.

Thanks guys for the help!