Without knowing what steps in what software produces what results (with a file or screenshot) it's hard to comment
If you're seeing that in mach 3 or a g-code interpreter, affecting EVERY arc, then check that all arc settings are the same in your post-processor (cam software) and g-code interpreter (mach 3, etc.), mismatched arc settings can cause that sort of thing
If it only affects some arcs it could be a software bug or some other settings issues,
The DXF file does not have random circles so that's not the cause...