Most likely a Wx Bell output issue. 850s are below 0 at Deep Creek throughout the storm. If the primary tracks into the OH Valley and ruins the mid levels, Deep Creek could mix.
I’ve seen in these setups, unless the primary tracks well into the oh valley or the coastal is tracking over central VA, Deep Creek will stay snow. Deep Creek will stay snow in these setups while Snowshoe and Canaan may flip to sleet or rain given their higher elevation, depending on the setup.