Follow these steps -
1. Click the My Account tab
2. Click the Account Settings link
3. Under the Listing Management section, look for the dropdown at the top that says "Display # of listings per page" and change that to 100 (or however many works for you)
4. Scroll down to the bottom of that section and click the "Update Preferences" button
You're done! Now all pages will default to the setting you chose

Happy Listing!
Cara