Tough bark on ribs! Ugh

I picked up a couple of racks of Walmart special baby back ribs ($7.00 per rack).... I was gonna cook them 1.5 hrs smoke, 1.5 hrs foiled, 1 hr back on smoke all @ 225*.

After the first 2 hrs (once the ribs were In foil) I left to to shoot skeet. I come back after 1 hr and the UDS has shot up to 315*. I figured no big deal ill just go 30min at the end instead of an hr. ribs looked good on the bend test. So I took them off.

The bark was rubbery and tough. Kinda like beef jersey. But other than the bark the meat was ok. Did I just buy crappy ribs from ole Walmart. Or did my temp spike ruin them?

I've cooked a ton of ribs.... This is a first for me.

They weren't fall off the bone but they were tender. The bark broke good on the bend test. When I separated the ribs before eating some meat would pull all the way off the bone.

It was my standard rib stuff... Butter, brown sugar, agave nector.

I've cooked ribs like that for years. This was the first time I've had jerky bark