@Lucas
Normally a 2.0 (Or anything with X.0.0) implies some major major changes, like a complete re-write or something like that. I'd imagine that unless Mojang do a major change they will just continue with 1.X until they do, that way it keeps it clean with versioning.
I have already spoken to Spigot, they are saying it is a Vanilla issue. I have also just tried it on a single player world, the bug is there, thats running Vanilla MC and has the identical issue.
Its not a big deal. In future just check the description because there is a "Confirmation Status" section, for this particular issue it has been confirmed. You can also see the versions that it affected above that.