:smarty:

HEY you're the one asking for advice

I go with the open, honest and blunt approach. To that end, I think that your, "Sorry about that, I meant to say...", approach is perfectly fine; and in all honesty it is preferable from a management standpoint. However, I don't know any specifics.

Read the room, as they say. Just don't go nuts with trying to bury your mistakes. State them openly to your superior; own them and move on.