So I have to insert page breaks at the end of each chapter, not after each page? I guess that also includes a break after the title page, toc, acknowledgement page, dedication, etc?
Yes. I encourage you to download Smashwods' FREE Style Guide. It explains all of this. Also, be sure to read the Amazon Kindle Direct Publishing information about formatting and covers.
I'll take this one step farther and say always read the guidelines for whatever site you are uploading your documents to. People on message boards can be very helpful, but it is often best to read and understand the guidelines thoroughly beforehand.
Since I'm already suggesting one thing, I'll suggest another. Create your first document cleanly: no tabs, no returns/enters between paragraphs, no extra spaces. Save that document as your source document. Any changes you make for a specific sales channel, use the SAVE AS feature so your source document stays clean. You can give it a similar name, just add Kindle or Smashwords or Apple or whatever to the name so there is no confusion later. If you are ever in a situation where your document gets kicked back for some reason, you will have your clean version to go back to.
Another suggestion: date your revisions. I have seen quite a few posts about uploading the wrong version of an e-book.
Example:
Book Title: Greatest Book Ever
Source Document Title: Greatest Book Ever
Kindle Document Title: Greatest Book Ever KINDLE
Smashwords Document Title: Greatest Book Ever SMASHWORDS
Kindle Document Title With Revision: Greatest Book Ever KINDLE Rev 9-14-13
If you don't like spaces (All Romance e-books only allows documents to be uploaded without spaces in the file name), try this: GreatestBookEverKINDLE9-14-13