<human>: My girlfriend and I got a call this morning from apartment management for the place we are schedule to move into tomorrow saying that they accidentally typed a "9/2/2011" instead of a "9/12/2011" for the move-out date of the current tenants. The managers offered for us to move in to a different unit (not near the one we want) until the 15th at no charge (8 days) until our promised unit will finally be available.

They then said that any extra costs such as moving trucks or cable hookup for moving from that temporary unit to our promised unit on 9/15 would be OUR responsibility. My girlfriend and I are losing a day of work each because of this inconvenience. Both the property management and us have already signed our rental agreement for Sept. 7th. To what extent are they obligated to compensate us?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: New apartment managers pushed our move-in date back a week, say they aren't responsible for total cost of our inconvenience.