Thanks so much for the reply. It does appear that if I delete my project in the DerivedData folder, delete all Archive builds, and remove the build installed from the App Store, then I am able to get it to work. It also requires me to empty my trash.
Is there no way for me to have both the App Store and local developer build installed simultaneously?
Regarding the issue with Safari, is there a bug that can be filed? It's definitely odd to have to delete everything every time I submit a build.