
Cinnabonkiller! (great name!)
Sounds like you're doing a great job! Congrats on your growing health and weightloss.
As for P1, it's better to do it when you know you can truly manage it than to do it halfway and just frustrate yourself. Are you craving? If not, then consider just doing P2 and jumping back to P1 if the cravings show up.
I think your back might be hurting as your body readjusts to what weight it's carrying and where. It should go away if that's the case, but it's definitely worth checking with your doctor. Losing weight is a GREAT thing for knees...I don't remember the numbers, but every pound you weigh puts an excessive amount of pressure on your poor knees. It's worth checking with your doctor about the clicking--it could be something you need looked at. On the other hand, it can be just the sound of gas escaping the joint (not sure if I'm explaining that right?)...basically harmless. DH's ankles do that and my knees do too. I check with my physical therapist when we were working on my knees and she said that the clicking was not a problem or an indication of one. My knees are better but they still click.

Weird stuff, eh?
Glad to have you with us! Your cruise sounds amazing...where did you go? Every time I've been in Europe I've maintained my weight because of all the walking!