Tree Creator optimized bark material not applying the tiling of the original material.

I’m trying to change the tiling of a tree bark material by setting the original material to (2,1), but the optimized bark material is locked at (1,1). It doesn’t copy the tiling from the original and the only way to change it is from a script. How do I get it to change automatically?

Here are screenshots:

original:

optimized:

I just realized why the optimized material doesn’t apply the tiling of the original. It’s because the bark and the leaves optimized materials use the left and right halves of the same texture. Forcing the tiling will work only if there’s just a bark material on the tree. Guess I’ll have to tile the original texture in gimp then.