I've had my 386x12 thunderbolt 18 months or so. No issues with awnings. Even had a 3rd one installed for the last 10 feet at the garage. Sounds like the just missed the studs at the factory. Make them fix it under warranty.
2011 XLR Thunderbolt toy hauler. 44'5" at 12'2" tall
2011 Ram 3500 dually, 6.7L Cummins turbo diesel