This is the second revision of the capacitive touch PCB, where I have made the guard rings much thinner and not a closed loop. On the other side of the board, I have removed the ground plane from behind each capacitive touch area. 

Fingers crossed it performs more reliably than the first after reading the datasheet a second time.

Side note: I am dyslexic and find reading large amounts of text extremely difficult, along with spelling correctly. As such you are likely to see numerous mistakes in my writing. I can't tell you how much I rely on #Assistivetech to help me with reading through read-aloud plugins on the computer, and spell checkers.