Carol to get a flow rate of almost 89 GPM you would have to have a pipe of 2″ dia with a velocity in excess of 8FPS and still that would only give you 80 GPM.
You had better do the following. Shut off all you fixtures and then go back to your meter and see if the gallon arrow is moving. If you dont have agallon movement try marking the cubic ft reading and then watch it . If your losing water double check your toilets as here is where most leaks go undetected. If your toilets are losing water get them repaired right away.
SylvanLMP