I had some calibrating issues but not like that. I would get a new remote. The gold one that came with the special edition of SS has worked fine for me.
Wii Motion Plus single handedly ruined Syward Sword for me! I had to recalibrate and recenter the darn thing after almost every hack or slash! If it was only a once in a blue moon thing where it gets messed up I'd be fine with that, but it happend every minute! Take for example the final part of the final Ghiriamim battle; It took me six trys to beat him because of the stupid WMP. It didnt give me time to apreciate the game because I was constantly frustrated. WMP should've been an option.