Block templates trouble

Hello all.

I am having some trouble with the block templates:

If I create in a theme or in my layouts a block template for a specific section, it does not seem to work. If I create a block template in the _default directory, it works.

This setup does not work:

/layouts/section/baseof.html
/layouts/section/post.html

This setup works:
/layouts/_default/baseof.html
/layouts/section/post.html

Anyone else is having this problem?