No, and yes.
By default any balances in piggy banks are not included in the Total Savings balance on the home screen. This is by design so that you can't easily work out your piggy bank balance.
However, if you choose to 'reveal' your piggy bank balances then at the point that the piggy bank balances are temporarily visible, the Total Savings number on the home screen will update to include all piggy bank balances. At this point, the Total Savings number will show you all savings you have with Marygold.