Moving lots of Sims and changing lots of settings in quick succession can generate a lot of notifications. If you would prefer not to get these, you can turn them all off or limit them in the mod's notification settings.

Shift-click anywhere on the ground with testing cheats on, and select Home Regions Settings > Notification Settings, and then select the type of notification you want to modify. 

You're able to control the follow notification types:

• Changed Settings Notifications - controls if notifications get displayed whenever you change any other setting
• Sim Moved Notifications - controls if notifications get displayed whenever you assign a Sim to another World
• World Exemption Notifications - controls if notifications get displayed whenever you add or remove a Sim's exemption permission