I recently noticed that If I were to take the following journey:
RHL (Rhyl) to WBQ (Warrington Bank Quay)
Then go to advanced search and select : Go Via - MAN (Manchester Picadilly).
It will show you the timetable for the outward journey with 2 changes - Rhyl to Manchester, Manchester to Warrington Central, Central to Bank Quay.
The problem being, WBQ is before Manchester/ on the same line.
I assume this is just a glitch although if I were to buy tickets like this, would the route for the outwards ticket say Via Manchester and would they be valid to do so?