It means our servers checkpoint every block mined by us on the blockchain. Advanced checkpoint technology rejects any other blockchain trying to be introduced with a longer chain, making a 51% attack and double spending impossible. It doesn't affect or slow down transactions in anyway and no transactions are being manually approved.
It sounds like to me that you don't even want a blockchain. The entire point of a blockchain is so no trusted central authority is needed, and it expends a crap load of energy and inefficiency to achieve this. But from what you are telling me, all you really wanted was a digital token to start with - a digital token that is solely under your company's control. You have done the equivalent of inventing a great stove by using the excess heat from the radiator of an internal combustion engine. You gain nothing with your current implementation and in fact introduce a suite of potential vulnerabilities and security flaws down the road.