After successfully identifying the thorns at the horse ride, MC doesn't know what the flower and its thorns do when speaking to Emmett in Week 4. I'm also having some trouble with skipping, when week 4 started I couldn't skip any dialogue I had seen from the previous playthrough (which the game knows happened as I have boosted stats).
Viewing post in Bug Reports and Errors
The thorns are separate from the flowers they grow on, but I did add in another line if you passed that check for 1.10 <3
As for the skipping that's a ren'py function and completely beyond my purview and capabilities. One thing that happens is that if a line has been edited at all it counts as unseen, so maybe you are running into a few lines that have changed since you first saw them?
Sorry for any inconvenience!
<3