Is 44:6, contextually, says that YHWH is the only God, therefore only He can be the "first" and "last" God.
Rev. 1:17, contextually, says that Yeshua is the "first" and "last" man to ever have to die for the sins of mankind. That is, he was dead, and now he lives forevermore.
Not that simple. He is not a liar, but you do have contextual issues. Without proper context, the Bible can say almost anything you want it to.Jesus in Revelation, is either a liar, or Jesus is the LORD YHWH, the redeemer, the FIRST AND THE LAST.