I posted this on the Zoho one forum but was't getting a respones, wrong forum apparently. My time zone was set to the Denver time zone but when I was playing with the secondary time zone functionality the Denver time zone disappeared in both the primary and secondary time zones. It does not matter if your scrolling through all the time zones or searching the time zones, its not there anymore. Also the app was freezing when looking for time zones forcing me to refresh the browser, although it stopped doing this.