The network or a local affiliate is probably experiencing some technical transmission difficulties that they are unaware of. Once the captioning company delivers the caption file to the network, it is up to the network to ensure a quality transmission. To help the network troubleshoot, you should call or email the network with specific information about the problem, including the show's airdate and time, whether you were watching over cable, satellite, or off-air (think rabbit ears), what city and time zone you are viewing the show, and the exact nature of the problem.