Direct booking phone number format

The format of the phone number for saved direct booking reservations needs to be the same as the format used by Airbnb & other booking sights (+#-###-###-####). The igms format puts an extra hyphen in the last 4 digits when the reservation is saved (+#-###-###-##-##), which is causing me to have to manually create door codes. Anything I have to do manually negates the usefulness of your software.