Errors appear on Stampex Faststamps

Once again some errors occurred on the Post and Go machines at Stampex last week.  The pictures show two strips which were bought on the first day. A collector (who wants to stay anonymous) was lucky to get them.

I believe this machine (A2) was operating on a different IT network to A3 and A4 there were some difficulties; whether or not those contributed to this error, I don't know.  Thanks to VP (who didn't buy them) for the photos.