FICO, What’s that all about?

Okay, so over the past few years I have been trying to get to a better credit score. In the past I made really bad decisions, not paying bills, ignoring creditors, etc. But now I’m on top of the game and have paid off debts, have a really high interest rate auto loan, and have watched my credit score jump higher and higher. But in my quest for financial mastery I have become obsessed with finding out where I stand in the “clean world”. I have come to find out that Equifax (one of the biggest reporting agencies) has my score almost 70 points lower than the others, what gives? According to my other reports by Experian and Trans Union, I should be close to “good” and leaving the “fair” realm. But according to Equifax I’m still poor and high risk status.

Anyone else ever been in this spot? If so, what did you do?