I was looking in the CUI to see if I could add a keyboard shortcut for Group and Ungroup. My LT 2013 version is showing 2 buttons for each command. the Macros are different for each pair, and so is the description. I am not an expert in this area and it isn't clear to me what the differences are. The list shows the same icon for the buttons of each pair.
Group-^C^C_-pkfstgroup; * ;
Group-^C^C_group
Ungroup-^C^C_qkungroup
Ungroup-^C^C_ungroup
So, which command matches the button on the ribbon panel? And is there a difference to the commands?