Strange behavior - link text showing through button

I have a menu bar with 4 buttons. When I added links to the buttons, two of them let the link text show through the buttons (not desired), the other two do not (as should be). I can see nothing different about the two buttons in the center. Here is the result:

SOLVED: I don’t know why, but for some reason earlier when I switched the location of the two buttons on the menu bar, or perhaps when I added the link action script, a text box with the link text in it got added to the movie itself.