My 23 is...
...the same setup. I moor mine as well with no ill-effects.; I use two pennants and have had no problems with chafing. It seems as though the cleats are far enough out, and the boat low enough, that chafing isn't a problem. That is, the angle that the pennants ride works out OK. In fact, it rode out Issabelle in the Chesapeake last year on the mooring.