I've just noticed that level 50 armor now has an armor value of 26/27k which is more than double what is was before. the problem is that current level 50 in your invetory stayed at 10/11k armor. My pyromancer with 53k armor now only has 28% dmg reduction with no way of increasing the armor value except to pray to rng to get all the legendary armor again...
Edit: Problem has been solved with the latest maintenance.
We're aware of this and it should be rectified via an imminent maintenance - sit tight!