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So I have an Ecobee3 thermostat, and I recently installed an Aprilaire 600 humidifier. After much experimentation I think I have the frost control set up correctly to no longer frost up my windows, but I've been doing some more research into my run logs and noticed something odd. Looking at the humidity graphs, whenever my furnace (gas, single stage) kicks on, the humidity spikes an then drops back down to normal immediately after the furnace and blower shuts off. This occurs whether or not the humidifier has been scheduled to run or not.What could be causing this? Shouldn't the warmed air from the furnace cause the humidity to decrease due to greater capacity to hold on to moisture? It would seem that these spikes are causing my humidifier to turn off prematurely and not reach the "true" humidity setting. Any input would be appreciated.