Hi Jesee,
welcome to the forum!
You should use the "Input A" tab in the routing screen since you are remapping an input.
I made a few screenshots for you of my iPad where I have "Mic Pre 1" not only patched to the default (Ch.1) but also patched to Ch. 14.
this is before the patch change...
and this is after the patch change.
I also recommend that you take a look at the "Output" tab on the routing screen and notice that outputs 11 and 12 are patched to Matrix 1 and Matrix 2 resepectively by default
I believe Mackie may change the default in a future update so that XLR outputs 11 and 12 are fed from Aux 11 and Aux 12 by default. That makes way more sense to me and would eliminate people
getting confused as to why their 11th and 12th Aux sends don't work as expected.