The way I get Reforgelite to work for me is to put in manual stat weights. Nothing precise, but enough to let it know I want mastery > haste > crit. Then make sure you press enter after punching these in, otherwise the addon doesnt update. Spell hit cap is automatic, then put in whichever haste cap you want. (make sure in the space after you specify this cap, you put in a value less than that of what mastery is worth for you. Otherwise it will assume you still want more haste) Then hitting calculate/reforging should work correctly.