Nice job and design.

Quick question. Couldn't tell by the pics--at the bottom of the siding- where it contacts the concrete-did you flash the bottom of the siding or does the concrete contact the PT board in the pics?
It looks like you used Hardy siding. Did they just run the hose wrap down behind the PT board?
I do rot repair for a living and by the pics it looks like you have a problem in the making. I hope not. It can get spendy to fix it.