Pure speculation but my guess is he had a couple candidates lined up who couldn't be announced as quickly as the position coaches were announced. During the delay, due to additional coaching turnover throughout the NCAA those candidates decided to wait and see what would be available for them outside of here. Either Mora said "fine, if you won't give me an immediate yes I'll move on", someone committed to a different job (under our radar) or the additional time allowed Mora to cast a wider net.
Regardless, I'm not worried about this detail.