II wanted to design a program that is 8-1/2x11. I created a custom tabloid-half page so when it is folded, I get the 8-1/2x11 program.I The layout is correct, however when I try to print I get a message and it won't print. The message says the active document uses multi-page sizes and you can print booklets with consistent sized pages. My pages are all the same, so I don't understand why I'm getting that message. I am a new user, to InDesign, so it's possible that I'm missing something. Please help!