Seeing that DirecTV and Viacom can't even agree on the number of channels that have gone off the air (one says 17, the other 26) as a result of their deal expiring last week, it's no surprise that the two are continuing to challenge each other's statements on every element of the negotiations. The latest tiff? DirecTV claims it has "accepted all material termsincluding an increase that was more than fair" for the channels that were pulled, but accuses Viacom of trying to force an addition of the Epix channel package at a cost of around h