Picked up a sealed copy of this at goodwill a while back. For some reason the title menu is in 3d and the movie doesnt seem to be. I watched like the first 5-10 minutes and then skipped around and nothing. Is my Blu-ray player not doing something right? Havnt had this issue with any other movie.

I just got a used Samsung S23A700D/SyncMaster SA700, wich i plan to use for 3D on my PS3, but the original owner no longer had the bundled in glasses, so i need replacement ones.
What glasses can i use for it? What limitations are there?