The warped pages could be a bad run from the printer, or they could have gotten water-damaged somewhere in transit. Jagged edges, on the other hand, are called "deckle edges" and are considered nicer than straight-cut edges. I've also seen books with entire missing sections ("signatures" of, say 16 pages that are all sewn together to make the book), and those misprints can also run in batches.
Thank you Nathan! This is something I've never heard of and I've been buying books since 1972 and have a library of over 800 books. I do have other books like this but never wondered about it until now. I really thought it was defective and since this was a book I knew I would read multiple times I wanted it to be perfect. Thank you for educating me, and hopefully others who didn't know this! Though both books were definitely warped in a tilde ~ shape so I'm hoping my third book won't be. Again, thank you for helping me. Jill
The "saw tooth" pages are what they call a deckle edge. Just a fancy cut that unfortunately makes the book thicker and cost more. My copy did have this and you see this frequently in nice hard cover editions. Kind of a collectors thing really.