Nope. After Roberts corrected that phrase by moving the word "faithfully" to the front where it should have been, Obambi repeated the phrase with "faithfully" moved back to the wrong place at the end.
Not really. Roberts never actually said it correctly "I will faithfully execute the office..."
This is what he came up with, after stumbling.
"Roberts: the off... faithfully the pres... the office of President of the United States"
He moved it towards the front of the phrase, sorta, but nowhere near "execute" or in the right order. There's no way Obama could repeat that so it seems he went with what was originally said.
Just a confusing situation caused by nervousness. It seems like they were both able to see the humor in it and no one's really upset. No biggie.