Go ahead and shock the pool up. (See Best Guess Chlorine Chart in my signature below) to try and get rid of that CC reading. Also, bump the pH up some with some Borax. Probably start with a half a box, retest a couple hours later and then redose. Do this before you shock the pool because with high chlorine, you won't get accurate pH results. Everything else looks fine. Since you have a CYA of 54 (not sure how you discerned that number but anyways.....) i wouldn't use any forms of stabilized chlorine in your pool, meaning no trichlor pucks nor dichlor shock powder.

Hope you enjoyed your trip!