Drag and drop the LACP elements on the left into the correct priority order in the host-standby port-selection process on the right.

should be.

If you configure more than eight links for an EtherChannel group, the software automatically decides which of the hot-standby ports to make active based on the LACP priority. The software assigns to every link between systems that operate LACP a unique priority made up of these elements (in priority order):

1 = LACP system priority
2 = System ID (a combination of the LACP system priority and the switch MAC address)
3 = LACP port priority
4 = Port number

http://www.cisco.com/c/en/us/td/docs/switches/metro/me3600x_3800x/software/release/12-2_52_ey/configuration/guide/3800x3600xscg/swethchl.html#48821