X-axis randomly scales to -1

I have tried running several g-code examples in Mach 3. The first time after running Mach 3 and loading the code, it seems to run just fine. After rewinding and restarting the same code cycle, sometimes the x-axis will inexplicably change the scaling to -1 (scale "LED" flashes and displays -1. A few of the initial cuts may start out ok but then it suddenly reverses and all subsequent cuts are mirror imaged wrt the x-axis. Rewinding and trying again gives the same behavior. Manually resetting to +1 doesn't seem to cure it.

Any ideas on what I am doing wrong?

Do you have a legitimate license?

haha thats funny I had the same problem. I was running mach3 w/ a pirated license. Get a legit license and it should fix it

How do I determine if my license is legit?

Is your name on the top bar next mach3 cnc?

Also you have to purchase the license