It shows you the plane that's scheduled (as of whenever you're looking).
Airlines can change their schedules without a lot of notice, and if you're flying an airline that has a lot of similar capacity planes, there's lots of ways you end up flying on something else.
If it's a big enough deal tobyou that you're willing to refuse to board when you see the plane's nameplate, you're probably not going to have a great travel day. It would be better to book a different airline than deal with the chances.
Airlines can change their schedules without a lot of notice, and if you're flying an airline that has a lot of similar capacity planes, there's lots of ways you end up flying on something else.
If it's a big enough deal tobyou that you're willing to refuse to board when you see the plane's nameplate, you're probably not going to have a great travel day. It would be better to book a different airline than deal with the chances.