Well, I (thought) I had the same problem at one time, but you can't possibly need the Bevelle treasure.

See, that temple is the only one in the game where you HAVE TO use the Destruction Sphere and reveal the treasure to actually complete it. I also missed opening the chest, but you don't need to actually open them in any of the temples in order for them to count toward getting Anima.

There are three spheres on each side of the room in the Baaj ruins. Which one in reference to the others are you missing?