Aram Jax Bug?

I recently played Jax in an Aram match. Some strange stuff seemed to be going on with my MR and Armor.

1. First I had 65 MR in items plus my passive 31 MR. But the game was only registering 50 MR total, Not sure why this is.
2. Now when it comes to Armor I had no Armor items and had 257 Armor. I know Jax gets bonus Armor from his AD when his R is activated. But I had this much armor passively at all times. I also don't believe that I had enough AD to give my that much Armor when my R was active.

I am not sure if I am missing something, just seems like it was not working correctly. Match overview is linked up above.