I have a question about the cost of upgrading to the Gotthard Express (Art-Goldau –> Lugano). I have a Swiss Travel Pass 2nd class and I bought the seat for 24 CHF 1st class.
I paid 48 CHF for the upgrade, although I knew online that I only had to pay 20 CHF. I entered the data in the form fields, but I also activated “Advanced Search”, without making any changes to the additional fields that appeared.
After I upgraded, the amount seemed a bit high, so I re-filled the form to make sure that it displayed the same amount of 48 CHF. I no longer activated “Advanced Search” and it only showed me an upgrade of 20 CHF.
Which amount is correct? Why does a different amount appear, if I didn’t change anything in “Advanced Search”? Did I pay more than I should have?