Sound discoordination between Geni and mini geni - DirecTV

We have Geni and 2 mini Genis. The sound between the Geni and the Mini in an adjacent room is off by about 4 seconds, making it impossible to have sound in both rooms. We have called support and waited on hold to be told we would get a call back from second-level support. Twice. No call. What now? If you can't tell us how to fix this, please send someone out who can fix it.

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