Enabling both I2C1 and Uart1 on BBB 3.8 kernel

I’m confused by the duplication of pins when enabling I2C busses in capemanager. Why are the two bus pins doubled up (for both I2C1 and I2C2?)
If I enable I2C1, I’d like to use it connected to pins 17 and 18, with pins 24 and 26 left available for uart1 txd and rxd. Is this possible in capemanager or would I have to dig deeper into device tree to only enable I2C1 on 17 and 18?
Thanks,
JR

Should be no problem with v4.1.0:

https://github.com/beagleboard/bb.org-overlays

bone_capemgr.enable_partno=BB-UART1,BB-I2C1

Regards,