Sure, he'd glanced over the letters. Glanced being the keyword. He'd been a little concerned with other things at the time, namely: finding Rose. And once he'd found her well...she's more the type to worry about the intellectual aspects of these things. He could just get by with a basic understanding, right? Or so he thought.

But having been to a second universe before this one, he'd never bothered to ask anybody about the time discrepancies. They were hardly a new occurrence for him, after all. And so, nobody had ever told him about the variations.

"I...hadn't heard that, no. But..." It's not necessarily too much for him to take, moreso that it's something that's harder for him to come up with an explanation around. And his optimism just won't let him accept that. "But...that can't be right! Rose and I were pulled from another world that wasn't ours originally. And we were both brought here on the same day and we remember the exact same things leading up to coming here. She can't... I can't..."

He's reaching here, clearly. There has the be a different explanation, he's sure of it.