I tried to change two tickets online within the last days . . . but the booking system seems to be screwed up in regard to the fare classes being offered as new options. The system only shows me a small part of the fare classes that would be available if I would do a new ticket purchase . . . and it never offers me the cheapest fare classes. Also, the system shows me only a few flights and not all departure times that are definitely still available (according to a test booking of a new ticket).

So I think I might have to call whenever I like to change a ticket. This looks like a major online system glitch.

Anyone else encountering these problems?