Are the photos not on the google account (when accessed from a computer) or are they just not showing on the phone?
If you are trying to check the account from your phone, I would try from a computer. Sometimes things don't show the same. Also, are you sure that the photos from that date were uploaded to the google account? It is always best to check the uploads/transfers, from a device other than the one you are doing the transfers on, to make sure they actually went through.