Disabling Alphabetical Pager is not respected for events and contribution pages.

Steps to replicate :

Go to Admin > Search Preferences and turn off Include Alphabetical Pager
A to Z Pager is off for Find Contacts, Find Contributions, etc
However it is still shown on *Manage Events *and Manage Contribution Pages.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information