Hi Dustin,
Looks like the problem is that you have two canonical tags on your parameter pages.
eg. on lines 24 and 25 of the source code for this page https://www.stickylife.com/custom/vinyl-decals?limit=30 you'll see:
With more than one canonical tag on a page, Google will ignore both canonical tags - which is why you are getting duplicate issues.
You'll need to remove the second canonical tag to overcome your issues.
Cheers,
David