Originally Posted by RobertL

What version of crank and chainring are you using? My Brother wanted to move to eTap and use his 10 speed crankset but changes have to be made. From below, this might explain why it's moving the chain too far out: ***Our 22 groups actually have the chainrings slightly farther apart than our 10-speed groups***

I found this answer from SRAM regarding 10 speed crankset on 11 speed set up and vise-versa:

Scroll down about halfway to ‘Answer from SRAM/Quarq’
From: Technical FAQ: Follow-up on 10- and 11-speed compatibility | VeloNews.com

From the link above - ‘Answer from SRAM/Quarq’

Ten-speed chainrings can be installed on an 11-speed crank, just as 11-speed chainrings can be installed on a 10-speed crank. The spiders are identical. However, all of our groups are designed to function as complete groups, ***so if a 10-speed crank is installed in an 11-speed group or vice versa, we strongly recommend changing to the appropriate chainrings***. Ten- and 11-speed should not be mixed. ***Our 22 groups actually have the chainrings slightly farther apart than our 10-speed groups***, in order to ensure that all cogs can be safely reached in the small ring, and the chain and front derailleur are specifically designed to work with that gap. Running a 10-speed chain on 11-speed rings or an 11-speed chain on 10-speed rings could cause chain jams or derailments.

—Dan Lee
Public relations specialist, road and cyclocross, SRAM/Zipp/Quarq