Holy Priest - X'anshi, Shroud of Archbishop Benidictus in Customise Combo Fails

Whenever I select the Back (ie the Shroud) on one of the Combo buttons it is not in the combo I asked for. Instead I get a different combo with the other legendary I selected (plus another I did not selecte) and a blank slot where the Shroud should be!

Could you post the string of data that you copy from the addon to our website so that we can try to reproduce your issue?