that might be your issue. New chains not working is a red flag imhothe chains are reused i figured the tensioners would compensate because when i tried to use the new chains from the kit no amount of prying would let the tensioner slip into place, there just wasnt enough slack
i hate to say it but you might need to start over. I've installed boatloads of modular gears/chains/cams and never ran into this.
Are you using metal or plastic tensioners? There is a ratchet mechanism in the metal tensioners and if you don't properly collapse them it might cause problems like this