I have no idea why it is doing this, but I will select

T1-1,2 

T1-3,4,5,6,7,8

It will give me 1-8 AND 3-8 again. I don't think I change anything but if I redo the whole process a couple of times, it will eventually give me the correct T1 pages 1-8. 

I take the saved pdf file and attach it to my outlook email. I'm having to check every pdf that I send so any help would be great.