Replacement Failure RT and LT buttons activated by shoulder bumpers

I just replaced the shoulder bumpers on my Elite One controller. I put everything back together and lo and behold when I push the RB or LB buttons it activates the RT and LT buttons. What did I do wrong? The instructions seemed pretty straightforward but obviously I didn’t do something right! Any help is appreciated. Thanks

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0