Yup - you are entirely correct. The same thing just happened to me when I tried it just now. I never tried a second time after getting it to work when I did - guess I was too excited (or my wife yelled at me to come down for dinner). We need to get some instructions from MTH about how to make the non-master WTIU's have the master WTIU address as their default when they power up. That would, I think, avoid the tedious step of redoing the WPS connection every time. One wonders if this could be accomplished with a firmware update?
PRK