he probably recorded the backing tracks himself as he is a good player judging by his band videos on YT

http://www.youtube.com/user/chuckeys123#p/u/15/aWyInb_d6ew

http://www.youtube.com/user/chuckeys123#p/u/13/VWkhCjwfZ1I

.....so what?..and now he's singing over them so what?, nothing new there..it's done everywhere, on big venues too done to backing tracks also like Disneyland shows etc, etc, .... this way every show & performance is exactly the same every time...so what you change the chords and the AUTOMATIC accmp does all the work for you what a novel idea !
All that matters is when you close your eyes what does it sound good?