"This can't be too hard" *clicks link* .. "Oh.."
I think your diagram must be wrong.. it looks like 10,11,12,13,14 are in a stack, but with assymetric in/out links.
If you can ensure ActiveIQ is enabled, and then message me your system hostname and serial number, I'd be curious to check what I can see from ActiveIQ/Autosupport.
Thanks!