Presidential Dollars (2007)

Found my own answer:

"Upside-Down Edge Lettering - Upside-Down edge lettering on business strike (normal circulating dollars) is not an error. Unfortunately, the U.S. Mint Customer Service Agents (their call center) were telling people who called in to ask that upside edge lettering on regular circualtion strike coins was an error. This created a lot of confusion, and took numerous conversations with the call center supervisors and managers to set the record straight. No sooner had the scores of emails a day about this finally tapered off, than they started anew! I finally had to call an executive at the U.S. Mint and ask him to intervene. Folks, no matter what the U.S. Mint Call Center tells you, upside-down edge lettering is NOT an error unless the coin is in (or came from) a Proof Set from the Mint."

Mint Dudes and Dudettes >>>>

That is correct. For business strikes, the letter is applied by a second process after the coin is ejected from the collar. It all depends on how it lands. So, like a literal flip of the coin, it is a 50/50 chance the lettering is "upside-down".