Mmmm…not surprising, a few years ago a DEC contractor screwed toprope anchors the same way. I could not believe it when I turned up and saw these ringbolts with test tags attached to them and could spin the bolt with my bare hands!! Maybe this was the same guy. There is a couple of well documented ways to screw up a gluing job and both involve not mixing the two parts of the epoxy glue together properly.
As they say….only your mother can be trusted….