The strangest thing happened, today. I used teamcraft's simulator to try and create some macro. Specialist and non-specialist 35 dura macro worked, specialist 70 dura macro worked too but the non-specialist 70 dura macro failed (good thing I tried with a ring first). I was able to use every single move in the macro, but fell short of 5 synthesis point while I was one point ahead in my simulation. So I reopened the simulator, entered manually the macro and... impossible to finish the craft. According to the simulator, I'm missing something like 20 CP to make the last two moves, and even if I had them, the synthesis would still lack more than 200 points.
I'm sitting there, trying to understand what went from "Ok, this macro works in the simulator." to "ok, this exact same macro with exact same stats doesn't work at all."