As I've been leveling crafters, I've found that it is mostly correct as you level if you keep the stats up to date, but it does seem to occasionally have what I suspect are rounding errors. So if the rotation I design is cutting it close on progress (e.g. required progress is 1000 and rotation is predicted to achieve 1005 progress) I'll do a test run with Reclaim loaded and abort if the 1st synthesis ability doesn't hit the predicted progress. IIRC, this was mainly a problem 55-59 and 65-69 and always seemed correct at 60 and 70, YMMV.