Who added the second "r" to the word "corelate" to make it "correlate"?

Does anyone or anything benefit from that addition?
Was it best to do so?
I am certain the second "r" confuses and is unnecessary.

Was it necessary to add the second "r" to the word "corelate" to make it "correlate"?

Does anyone or anything benefit from that addition?
I am certain the second "r" confuses and is unnecessary.