I've had a long standing policy of not taking submissions for new episodes of shows until after they air. I only have a couple of current shows anyway but networks tend to bump schedules so often that it makes a lot more work for me to go back and "fix" everything afterward, using up time I'd be spending on other guides. Or it opens up the door to gaming by the submitter, who after the fact, goes in and submits changes for the incorrect information they submitted before and gets double points for it.
For one particular show, which gets changed by it's network all the time, I don't take submissions ahead of the air date. If I did, I WOULD FILL THEM IN MYSELF! So if I, who have the same information everyone else does, won't pre-fill in the episodes until they air, I'm not going to take your submissions before they air.
So to all the submitters, the rule is, wait until it airs. If I beat you to it, well, I am the editor of the guide. Remember, the form says: "Date airED"!
I'd like to know what other senior editor's policies are concerning premature submissions.