Agree about making it clearer, though this information can be added at check-in and unless you are checking-in on online and travelling with no bags, then this is the main reason you need to enter the details early. In my opinion, at most easyJet airports there is very little point in checking in online if you are checking-in bags as you still need to queue, unless you have paid for Speedy-plus and an extra check-in is open.