What did you do to get it burning too hot?
What was the 3 mistakes?
With mine I load the charcoal basket full then add 1 chimney of lit charcoal on top using no lighter fluid at all then throw a couple chunks of apple or cherry wood on top. I have not had any trouble with meat coming off the hooks. From looking at the pics it looks like you may have hooked that one on the thin end instead of the meaty end and you are supposed to have the hook under the 2nd bone from the end. I did 2.5 racks my first day with the grill and did not lose anything. Even the 14# packer held on like a trooper and the end of it was laying right on top of the coals but never burned.
I did hook them under the second bone on the meaty end (where the ribs are shorter but there's more meat). The three mistakes were:
1) I didn't have the right number of coals in the chimney. Amber swears you should use exactly 40 briquettes. Worked better when I did!
2) I left the coals in the chimney for 30 minutes instead of 15 before adding them to the basket.
3) After adding them to the basket I left the lid off for awhile while I finished preparing the ribs.
So, on my second cook I corrected those mistakes -- exactly 40 briquettes were in the chimney for exactly 15 minutes and the lid was put on as soon as I added the lit coals to the basket and hung the meat. It worked better a lot better that time, as the ambient temp was 50-75 degrees lower than the first time. No wonder the first ribs were overcooked!