As Stik points out, those issues, as well as other special releases, were never a part of the subscription. It clearly states that the subcription is for 10 issues a year and those are not listed as monthly issues.
Also, even if theyw ere given to subscribers at the time, why would they send them to a new one. Even as a subscriber, if you want one of the monthly back issues, you still have to buy it. The subscription is for the next 10 issues.
I am a Norfolk man and i glory in being so
On the bench: Airfix 1/72nd Harrier GR.3/Fujimi 1/72nd Ju 87D-3