SRAM X01 shifting issue

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It's a standard SRAM X01 Type 2.0 11 speed rear mech. as per link below:

 

https://www.sram.com/sram/mountain/products/x01-x-horizon-rear-derailleur

 

Exact same RD and will not be looking at Shimano again. 

 

I see a lot of E13 users on their forums using the SRAM 12 speed chains (On the 11 speed) and have much better results as well that the standard chain. There should be a inherit grind of the chain against the 10t cog gear while in the 9t cog that it eliminates. Especially when the E13 gets dirty. 

 

Glad you got it sorted though.