Problem retrieving time/mileage

I am having issues getting route calculations.  The problem seems to be centered around part of a single street, I believe (Oak ST, Kissimmee, FL).  We use the API to get Latitude and Longitude and use route matrix calls to get times and mileages.  A null result is returned when using certain Oak Street addresses.

This can also be demonstrated in the web interface for directions (https://www.mapquest.com/directions) entering the following addresses.

911 E Oak St, Kissimmee, FL 34744

833 Country Cir, Kissimmee, FL 34744

Let me know if I need to provide any additional info.

Thanks in Advance.