Perhaps you should unadjust the chain tension. Start over, then 1 step at a time, in the correct order and l'll bet the problem becomes very obvious.
Easy for me to say! Right?
I'm not doing the work!
I can't even begin to know how many times i've had to redo something. I've spent hours making something only to find some flaw, either in theory, process, function or fit, only to throw it in the scrap and start over. Thats learning the hard way.
Take a break, rethink it and start where you started when the problems began, you'll figger it out quickly.
Probably 90% of the classics here were discarded at some point cuz the PO couldnt fix it, didn't know how, or got frustrated.
Thats all! Now git out there and give em hell!
Dont take no shyt from some little machine!