I recently got a new iMac at work which has ruined my life. Aside from the terrible performance of Yosemite compared to Mountain Lion, I had been running the 2015 Office Preview version of Excel, which has eliminated the use of Customize Keyboard and instead opts for a Personal Macro Workbook to customize keyboard shortcuts. I finally got 2011 installed on my machine, but when i save the keyboard shortcuts, they disappear after I quit the application. This has happened at least 3 times today.

Any help in correcting this behavior would be greatly appreciated.