No, you can always use a smaller grout size clip and use our Tile Crosses to make up the difference. By using this trick you can reuse more of your material and it offers the installer greater flexibility.
This may be because the breaking off of the clips is not done parallel to the grout line. One should always strike the sides of the clips with a rubber mallet or safety shoes parallel to the grout line. Another possibility is the the tile work was left to dry with excess adhesive on the tile edges. This can be avoided by cleaning the edges with a putty knife when the adhesive is still fresh.