Charlton v Derby 64/65

[smk06]

I have had several copies of Charlton v Derby 64/65, all with the back page neatly cut out. Does anyone know if all copies were sold like this or if the back page is likely to have been removed after (and why)?
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https://www.derbycountymemories.co.uk - Rams history & memorabilia
Twitter: @DCFCMemories

Derby County home wants:
1982/83 Sunderland Fr (s/s)
Reds v Whites & Whites v Blues 1948-1957
1946/47 Arsenal post 5/2

Derby County away wants:
1968/69 Carlisle post 8/2/69
1946/47 Middlesbrough, Liverpool
1945/46 West Brom

Also looking for Guiseley home programmes pre-1980s.