I agree with your last point that it's about respect. Also should be about honesty even if only on the third date, there are things you do and do not do if you're trying to date someone and maybe have something more with them.

It does not sound at all like he was honest but I hate to say this but, he sounds like a deceitful person already. The thing that comes to mind now (even though you briefly described this to me earlier) is that it's as if he told you they were friends only originally so as not to ruin his chances at dating you initially. he may or may not be a player but he doesn't sound like someone that is one that is trustworthy. Who knows what else he is giving you half truths of? I mean he told you just friends with the other woman and now another story about how she only sees him periodically, can we trust that this is even true at all?

I don't even think that I'd keep this guy as a friend. Lord knows he's probably doing the same to the other woman he speaks of.