I am writing a program to generate some G code. I have Mach 3 and my desk machine and on a lathe (DIY). well I get to rev 4 and move the code to the lathe and I notice a mistep, but otherwise it looks fine. Rev five )below) looks fine on the desk top, but shows a large ball on the lathe display. nothing else has changed.
Anything anyone could point out would be great

G80
G01
G95
G0 X.036
M03
G3  X.09 Z1.8505 I-40.1655 k2.0879 F0.6
G0 Z2.1005
G1 X.0375
G0 X.0503 Z2.463
G1 Z2.713
G3  X.0115 Z4.827 I-71.7897 k2.7005 F0.6
G0 X1.2168
M30