I think the axe quest is incomplete. You should have stumbled across a hard stone at some point (can't remember where) in your travels and when you go to the kitchen, to sharpen it, it should say it isn't hard enough and you need to keep looking. Unless I missed something, the 'still looking for a whetstone' isn't complete, probably in a later update.
As for Robin, it sounds like you need to spend more time with her in the evenings. If you have trained your stamina to the point you need more motivation to improve, I think you just need to spend time with her in the evenings. Might not be any special scenes, but there are some scenes sitting on the couch where you two just sit and talk about things.
