Hi guys, need a little help please.

Doing a roughing pass on a 3d terrain file and when the second pass started the machine was cutting deeper than the g code indicated. I've included screen shots of my setup and the Mach3 screen when I interrupted the cut as well as the actual material being cut. You can see the g code calls for Z-0.2 yet the display says it's cutting +2.28. Clearly I've got a parameter set incorrectly somewhere...

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I tried restarting the computer, regenerating the g code (though the code appears correct), closing and restarting Mach3. I saw this one other time with a 3d terrain file and when I re-ran the file it worked correctly. Restarting this time just moved the place in the file where the error occurs.

Anyone seen this or know of a fix?

Thanks. Scott