If the shotgun patterns to the center with other chokes than take back the kicks and get another one. I've seen screw in chokes that patterned off by almost a foot. Sometimes you get a bad one. How far off is the pattern and what type of shells. Changing brands of shells may move the pattern. If it prints the same with different brands than it is either the shooter or the choke. Did you shoot from a rest with the gun supported?
THe kicks really patterns well I hope its not the choke. I will try my buddies Indian Creek choke and try some different ammo. At 20 yards it shoots about 5in low and 5in left with a really nice pattern. I shot using shooting sticks multiple times with the same results. However I did shoot 1 Winchester round left over from last year it it shot center at 30yds so maybe I'll try that again too.