iternabe when this happens I should abandon playthrough and just go back and practice sections or phrases.
I find this so frustrating that I rarely do this. However, Pianoteq records everything so it is easy to simply play back and check which mistakes I made that need fixing.
I use the Molly method almost exclusively for learning the correct notes. When it comes to expression and dynamics, I work with it as I used to do. When I play something and I think, mmm here I should play just a bit softer, I don't do ten times in a row. It would drive me nuts!
And it also happens that I "forgive" myself when I make a random mistake, and I feel I am just not up to working with that one. It will either recur, and then I'll fix it, or it will not recur, and then it didn't need fixing.
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... feeling like the pianist on the Titanic ...