Some folks say that if you're going to "go bad, go big." Or, if you're going to lie, tell a lie so huge that no one will believe you're lying. I guess that works in some circumstances, but certainly not with respect to something that can be readily quantified and measured.
So, if you're going to claim that you billed 3600+ hours on legal work, you should not be surprised if somebody grabs a calculator and figures out that you worked 10 hours a day, seven days a week, for 12 continuous months.
As we say in the legal biz, "your claim proves too much." More specifically, "you're lying."
The rest of the story follows naturally from there.