Shiprush changing apt. #?

Hello,

We are just wondering if it is possible for ShipRush to change the apartment number of someone's address? The apt. number was correct on our site, but it seems to have changed to a different number once it converted over to ShipRush. We are thinking that this customer may have changed the number after placing the order and is trying to scam us, but are unsure if this could be a glitch with the ShipRush software? It's only happened to this one customer and this is the second time that she has complained of it. Thanks.