The coleman heat pumps we've had in the past would do that. Furnace kicks on to bring up the temp then heat pump takes over. I really don't think anything is wrong with it. If in fact your wife did hit the t-stat setting up that much, more than likely this is what happened.
John and Rebecca Dickson
Emma-8 / Little John-5 / Iva-1+
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)