FA printing problem - item numbers with "ghost"

[SJ]

Some, but not all, illustrations have a "ghost" alongside the item numbers
when printed.
On Screen the item numbers look fine.

FA rev 6.2

By "ghost" I mean another same number superimposed over the first one . .
.slightly below and to the left. Looks like what you see on a tv running
with rabbit ears.

But the illustration itself is clear with no ghosts, only the part item
numbers have a ghost.
Printing the illustration by itself does not cure the problem.

Examples of a ghost can be seen on these pages when printed:
A10Q, 90, MG 1, SG 09, Ill 8-00
A10Q, 90, MG 2, SG 29, Ill 26-30

Is this just a defective illustration file, or something to do with
computer/printer settings?

SJ
85 Dodge PU, D-250, 318, auto
85 Audi 4k - - sold but still on the road
88 Audi 5kq
90 Audi 100q