Formatting Wrong After Converting To PDF

Hello,

Used Caliber for a while now to convert my Amazon Kindle books to PDF. Sometimes I like to print the PDF's.

Never had a problem with the formatting before, but now the PDF prints the text per page in a small box, about 3.5 inches by 4.5 inches.

I didn't change any settings (i.e. margins, padding, etc.) and can't figure what's different? Any ideas?

Thanks!