This is likely to have happened due to a ‘flat rate’ charge being entered.
A ‘flat rate’ charge is automatically applied per invoice type. Eg, if the child is on the invoice type ‘calendar monthly’, the flat rate charge will apply per month. If the invoice includes a session from a previous month, the flat rate charge will double as it will apply itself not only to the previous month but also current month.
There are two things that you can do to fix this:
- If the previous month had an extra session, you can change the flat rate charge by going into Children > Accounts > Charges > Flat Rate Charges; Apply to Regular Sessions Only
- If the previous month is a regular session you will need to process this month before the current month to bring the account up to date.