Autonumbering skips a message to the left or right (not to an actor in the flow):
http://www.plantuml.com/plantuml/uml/LSv12W8n38NXVKuHD-vw0P4o5_04hf8sZWNRb3O5yVGMP93klX_UuctTgDd8BpZLHdicDD4FMXi2y4nHyA5gh6-0EeSff4h5a9RYfS9ISIa1e65QHcPfqyxp1MzzXpEoy-5mS3x-3FUhmyF__VGc9SxVNm00
Also, something seems to be frail in how it processes the message, and I had to insert a newline to get it to continue processing.
Without teoz, this works.
BR! /marcus