CellComparator.compareStatic() compares type wrongly

    //type
    c = (0xff & a.getTypeByte()) - (0xff & b.getTypeByte());
    if (c != 0) return c;

      // Compare types. Let the delete types sort ahead of puts; i.e. types
      // of higher numbers sort before those of lesser numbers. Maximum (255)
      // appears ahead of everything, and minimum (0) appears after
      // everything.
      return (0xff & rtype) - (0xff & ltype);