I may have figured it out:
1. Lastwake command info
My mouse is set to not wake the computer in devices, and it is plugged into a USB 2.0 port. In fact I have 4 USB devices all plugged into 2.0 ports, with nothing in the 3.0. Mouse, keyboard, audio device, and unconnected cord.
Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.
Wake History Count - 1
Wake History 
Wake Source Count - 1
Wake Source 
Instance Path: PCI\VEN_8086&DEV_8C31&SUBSYS_85341043&REV_05\3&11583659&0&A0
Friendly Name: Intel(R) USB 3.0 eXtensible Host Controller - 0100 (Microsoft
Description: USB xHCI Compliant Host Controller
Manufacturer: Generic USB xHCI Host Controller
I did notice these two devices able to wake the computer:
My mouse is in fact wireless. Microsoft's M&K Center installed an extra 'device' that is able to wake the computer, the second one listed. I disabled it in devices, and hopefully that is the end of it.
C:\Windows\system32>powercfg -devicequery wake_armed
HID Keyboard Device
Microsoft USB Dual Receiver Wireless Keyboard (Mouse and Keyboard Center)
I looked over this step previously but must have missed the second 'device' it, thinking it was connected to either my mouse or keyboard, and not able on its own to wake the computer. This has been... drama.
Thanks for everyone's help though!