Noticed this the last few times through DFW, especially with SFO flights. Last night's 1108 DFW-SFO was nowhere to be found on any monitor, either the All Airline monitors or the AA only monitors in the AC. Then to add to the confusion, the A-29 gate monitors weren't working properly, displaying no flight info and only the AA promotion slides mixed in with this whopper... "AA 1108 to San Francisco is now departing from Gate B1".