The invoices are dated the first day of the billing period (e.g. April 1st for the period of 4/1 through 4/30) when it is standard to date an invoice the last day of the billing period.
Well it depends on how the billing is done. DO technically issues the invoice on the 1st of the month, and It is updated hourly. The April 1st represents the issue date of the invoice. DO deducts funds from your account on an hourly basis, not monthly. Either-way, I don't see it being a big deal.
Will have to look into that but I think your suggestion may be correct.
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