"Page transition diagram automatic create" feature automatically creates a transition diagram based on the information recorded in a proxy log, but in some cases, the transition diagram may be formed in an unintended order.
Therefore, you MUST check if the transition diagram is properly created, and change or delete the nodes as necessary before setting up Pre processor.
For how to check a transition diagram, see the following FAQ article.
[Related article] "Tips for creating scan scenarios"
For details on the step, see User Guide "Create page transition diagram" or Vex8.3 Quick Start 126.96.36.199.2 "<STEP2>Scanning by page transition diagram".