Issue communicating with arduino mega

I have an issue with my axis on first push of any direction the position on the console does not move but the position in the move does. As I hit the second arrow again it will then report in console it moved. The position will then show a number that isn’t close. If I hit the same direction arrow again it goes the other way. I am using grbl ver 1.1g.20120813.Mega. Could this be a compatibility issue?

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