When Rockwell is talking about the Battle of Salamis, she dates it at 'a couple of hundred years ago'. This battle occurred in 491 BC so it would have been closer to a couple of thousand years ago.
When Ezekial and Stone are on the submarine, they shouldn't have been able to be in contact with the others via cellphone as they would not have been able to get a signal, similar to how you need to be on the deck to be able to make a phone call while on a navy ship because of the metal of the ship blocking the signal.
When Ezekiel is typing the coordinates into his phone, he only uses the same couple of keys (2/3 and 9/0), and yet those are not the numbers that appear on his screen.