Web Inspector shows duplicate settings databases

[braveulysses]

The Safari Web Inspector lists two identical settings databases for YWP. Is this a Safari bug or a problem with the extension?

Expected:
Only one copy of yelpWithoutPityDB should be shown by Web Inspector.

Actual:
Two are listed.

Notes:
Preferences -> Security -> Show Databases only lists one db, making it likely that this is a Web Inspector bug. If so, a bug needs to be filed at webkit.org.

Steps:

1. Go to yelp.com.
2. Open Web Inspector.
3. Look in Storage -> Databases. Two copies of yelpWithoutPityDB will be present.