Question about S6 episodes

So I'm a first time watcher and I've accidentally already read some spoilers trying to find the answer to my question.

I'm watching on an IPTV box and it might not have the proper episodes/order.

I just finished "The Producers" where Fran and Niles produce a play and it ends with Niles telling CeCe, He loves her and says "marry me".

In the episode immediately following a narrator says "last time on the nanny", And it shows Fran and Max catching Niles and CeCe in bed. I continue to watch the episode and Fran references to Niles and CeCe quitting but you never see them quit befor? Am I missing an episode or something here? Maybe the last scene from The producers?