I think he is either manipulative as you said or going way to fast. What concerns me is that he went from concerned to angry so fast. Hopefully that is not a sign of things to come. He does sound manipulative and willing to challenge you very easily with little provocation. I would worry about someone that has all of these emotions in six weeks. I think the fact that he was willing to blame you about this is a red flag. He shouldn't have to check his records to prove a point. He could have just said that he could have done that and moved on. Instead he made an argument out of something silly.
I would be careful with someone who seems so manipulative so quickly. There will be serious issues as in any relationship and he can't resort to blaming. I would consider the costs and benefits to this relationship. Decide now if he is manipulative, controlling or mistaken.
Please press accept; this is the only way I am compensated