Do you have your class skill maxed out? Did you pick the one that gives you +100% Paragon/Renegade bonus? If not and you have plenty of Eezo you can try redistributing your squad points and pick that, then try talking to Miranda. Then you could spend more Eezo to put your character back to the way it was if you want.
He seems to have outdated info a lot of the time. A little while back, right before the Christmas break actually he made a post on the official forums talking about the import feature of the game and said you could only pick from the first 11 completion saves to import. This had quite a lot of people freaking out and it wasn't until the break was over that he was able to confirm with a developer that this was no longer the case and there's no limit to the number of saves you're able to choose from.