Mail changes my name to some odd contact or calendar group
For some strange reason Mail is showing my name as "Holidays in the United States" over the last week or so - prior to that it was "Gateway Tenants Action." The "Holidays ..." name is one of my calendar groups and the "Gateway ..." name is one of my Contract groups. I don't have the slightest idea why this is happening and I cannot find any relation between these names and myself in any part of the Contacts program. I had thought this was a bug in Mavericks but it is happening in Yosemite too. Any suggestions????????
[iOS 10.10, Mail 9.0, Contacts 9.0 on a Mac Mini [late 2012].
iPhone 4, iOS 5.1.1