ws2300 outside temp displaying the wind chill

Hello,

My lacrosse ws2300 min outside temp reads as the min windchill. If I reset the min temp a few days later it changes to min wind chill, this seems a bit odd and is a bit of a nuisance. Seems to be ever since i updated heavy weather software to new but beta edition which has been around for ages now but this could be a coincidence.
No other readings are faulty so not sure if it could be transmission which is wireless to base unit. Transmitter and base unit are only a few metres apart.
Anyone come across this?
Otherwise for what I paid , very pleased with the ws2300 system after 2 complete years.

rgds
MrJ