Thats a problem with your post or how you setup your tool and length number in your screen after you pick the the geometry in mastercam. Make sure they are the same number. You can edit on the floor by using the D key and moving the cursor to the line you want to edit then press C key to change and then enter after your done. If you dont like the change hit C key again and then enter the value you want to change and hit enter or enter the value you want to delete and enter a ; after it. Also if thats a stock fadal x5 post watch out for rigid tapping you dont want any X or Y numbers in with yoru g84 or g84.1 and g99 numbers and it may need a R value in that line if it doesnt do it. The oem fadal post from amstrcam needs a little tweaking.