Hello, I bought a ticket from Grindelwald to Jungfraujoch through the SBB website. Initially, it says there are no seats available, but I was able to reserve one. First, from Grindelwald Terminal to Eigergletscher, then by cable car, and then to Jungfraujoch. However, if I book directly from Eigergletscher to Jungfraujoch, the website doesn’t say anything about seats being unavailable. I don’t understand. Thank you.