I'm fairly new to Xlights (couple years) and it's a never ending learning lesson.
First off, I would recommend starting your pixels at Universe 1, since 1-4 are on the first port. Just to make it easy. Use the latter channels/universes for DMX (Assuming your using the Falcon DMX outputs).
Also, setup your E1.31 in the Falcon and Xlights as 510 channels, not 512. Pixels use 3 channels per bulb (3 pixels, red/green/blue, which 512 will not divide equally by 3, while 510 will. DMX is standard with 512, while E1.31 is 510 and not sure if I stated that properly, but should make sense if you've used DMX.
But, I can see right off that you have your "M" starting at Universe 2, which theoretically is not wrong, but then you have the E,R,R,Y set completely wrong with the wrong channel. With the latest of XLights, you can easily follow down the line by selecting "Start after model"... And select from a dropdown. This is best practice in my opinion so you can make adjustments on the first model, and the others will follow, when needed.
"E" starting at 525 and ending at 2123 will basically mean that you are using 533 pixels, or 1599 channels, which is definitely wrong, plus, it is overlapping with the other letters, including "M".
I could explain all I can, but probably not make sense to you with a bunch of words.
Here is a couple videos I recommend to assist:
Keith Wesley - Configuring Falcon controllers from XLights:
https://www.youtube.com/watch?v=Bfax5RK3FWILeechburg Lights - Universe and Start channel upgrade in Xlights 4 (older version, but still relevant to 2017)
https://www.youtube.com/watch?v=hMGAD1GjNi0Hope this helps.
-Tim