Tablet weaving SOS

I'm trying to practice some tablet weaving, using, among others, the great tutorial from string page here.

I'm doing a simplified trial run (sszzss) in thick cotton of the 14th century striped braid described here: http://www.cs.vassar.edu/~capriest/3recipes.html

There is something I'm doing wrong, but I don't know how to correct it.

Each time I turn the order cialis in reverse direction (e.g. 4 turns backward and then 4 turns forward), the weft shows through the surface. This happens only at the point where I reverse the cheap cialis from one direction to another. (Each of my turns is one quarter of the tablet, so in 4 turns, I'm in "home position" again.) You can see this happening in the white stripe left of the pencil, where the red weft thread is visible in a way that shouldn't be...



I know the weft should not be showing, but I don't know what I'm doing wrong. If anyone knows how to solve this problem, please let me know :-)