Jmm, first off, gotta say well done. You seem to have done everything pretty much by the book and getting some form of result. Must point out that I was especially impressed with how you got the kiss to move on from just a peck. The tease was well placed, and made you a challenge - drawing her in for a bit more.
Personally, I don't think you need to tease about the kiss again. Pointing it out too much may make her feel insecure and LESS likely to do it again. You don't want to make her TO insecure by going on about it.
Also, if it seemed like a 'smooth line' to get her to kiss you to her - keeping the teasing on may make her think your just after more kissing. You are, but you know the rules - we keep that secret
My advice would to be definately to throw in a "What you up to blah blah, think we need to schedule a kissing lesson. Need to give you some help" etc - mess around with that and make it yours - BUT then leave the tease there. Only use it to hook her in for another date; not as a recurring thing you poke fun at. Leave it there.
Let us know if you follow the advice or not, or even what happens. I like to hear the outcomes of these help calls
Good luck bro.