When going through the statements, if the numbers look incorrect, make sure the payer is actually selected first (blue checkmark), or click the orange refresh icon.
The statement will be refreshed and display accurate numbers.
User can click on the PDF icon to see the statement itself.
Also see:
How to Read a Statement and View Billing Breakdown
How to Preview Statements (How to Publish Statements)
How to Preview Statements displaying the manual invoices and/or credits.
How to Publish Statements displaying the manual invoices and credits.