Some guys on Elitist Jerks have done alot of testing and found out Blizzard failed when typing the new expertise cap number in the data. The bugged cap seems to be 5.6% (22.55 expertise, 173 expertise rating) instead of 6.5% (26 expertise, 200 expertise rating).
This allows you have a lower amount of expertise so you can gear/gem/reforge to another dps-increasing stat.
Proof is here:
New expertise Cap
And I want to point this out specifically from one of the tests:
0 dodges out of more than 9300 white hits.