duplicate accounts in contacts

I am running the GM of Yosemite. In the Contacts APP under:

Preferences / Accounts

there are 2 entries labelled "iCloud"

Both point to the same Apple email account. Both have the same number of entries. By entry count, having both enabled is the same as having either individually enabled.

I have toggled inactive one of the account entries. So the net effect is the same as only having one entry for my iCloud account.

My question is why do I have identical entries and is there a way to delete one without losing data?

(my concern is system integrity across repetitive upgrades)

Thank you