The 3rd and 4th Plagues of the gnats and the flies were not shown before the Plague of the Livestock. The 6th Plague (the boils) was replaced with the wintry weather and the 7th Plague didn't not have hail, instead it was replaced with fire, burning and damaging much of Egypt's crops.
The ruler of Egypt at the time of the Exodus wasn't really Menephtah (Merneptah) son of Ramesses II as though once believed, for he was already an elderly man, reigned for almost 10 years, and died in 1203 B.C.