At the end of the episode, as Christina leaves the building, she exits twice.
On the consent form the kids' mother signs, the signature date is in 2014 but the notary seal says its commission expires on 11/31/2012. First, no such date exists, and second, the notary commission expiration date must not be before the signature date of the document because to do so would make it an invalid notarization and nullify the document.
When Catherine originally asks how much they need to save the hospital, Richard says $175 million. When Richard goes to visit her in Boston, Catherine asks should she take her $24 million and go somewhere else because no one from Grey Sloan Memorial could win a Harper Avery award. Each of the owners only put in the $15 million they won which is a total of $60 million and Richard for $3 million, which only totals $87 million. Who gave the rest of the money?