You can edit the notification list and order bu tapping "alamrs" in the app, the "More" and finally "Notification List"
By default only the person who set up the account is notified, but you can add additional users to be notified by tapping the "+" in the upper right of the main screen in the app (dashboard) and then tapping "person"
Hope this helps,
The only workaround I can think of is to get a VOIP service if you don't have one like VIATalk or something else where you can have it ring multiple mobile phones at the same time on incoming calls. This would only work for the phone calls, for the email messages youd have to create an email address they send to and have that auto forward to multiple emails.