Awsome,I'm glad that it worked for you,tho I still can't imagine why it wouldn't boot the image it installed,then booted to. This phone has more quirks than I think I've ever seen.
I was hesitant to.recomend permantly installing it,since there is currently no ruu for your build,and now there is no way to back up stock recovery since it is gone. Hopefully an ruu will pop up,but in a worse case you can just restore an m7_ul stock recovery from another build. Maybe from the att build that you share a modle id with.
Welcome to root,android forums,and the wonderul HTC one.
just holler if you have any questions