Step Counter

Not sure what's going on but my 955 has been reporting wild step counting numbers. For example after my run today my watch reported around 10,000 steps which is about right and consistent with normal reporting. However over the last week or so while driving the watch has been adding/reporting 3,000 to 6,000 extra steps added to the 10,000 that was accurately reported!? In other words the watch is registering thousands of steps while seated and not moving my wrist. Anyone else have a similar issue? I was also thinking maybe the next firmware update would settle things down but I'm not sure when it'll be released. 

Thanks, Tyrese