Good question, in 2015, Seattle won SU but didn't cover at Minny, but lost SU & didn't cover following week at Carolina as a dog.
Pitt won SU but didn't cover at Cincy, next week +7 at Denver they lost by 7, so a push.
Now in 2014 Dallas -5.5 won but didn't cover, next week Dallas +5.5 lost SU but covered at Gbay.
Gbay following week +8.5 lost SU but covered at Seattle
Just a few examples, can go either way.