I'm not entirely sure that Wentworth is aware to the degree that his newfound groupies are smitten by him. As Anne says there is no triumph there.

All the quotes at the end of your post were excellent examples of how Wentworth was communicating with Anne through his conversations with other people. To me that shows that his thoughts were really so occupied with his conflicted feelings about her that he didn't how deeply he'd gotten himself in with them until it was too late.

I don't think he's misleading them on purpose. When he talks to Louisa during the walk, he is talking in a general way about her personality. I don't see any comments that could have been misconstrued as anything other than complimentary. There are no sly references to marraige or anything to make her think that a proposal was forthcoming. Even the nut speech seems meant for Anne, even though he doesn't know she can hear him.