Basecamp error planning route from Donegal to Gettysburg PA USA

I'm having trouble using Basecamp to plan a route and I'm hoping another forum member can try this for me. I'm using Openmaps of North East USA which I have downloaded in order to get a routable map. I am trying to plan the route from Donegal PA to Gettysburg PA but instead of doing a drive distance of approx 110 miles it is giving me a very long route going across to the west coast and back again approx 1000 miles. The activity setting is driving. I would be interested to know if another forum member can reproduce this issue.

(I am planning a possible trip to the US from Australia later this year or in 2017)

Thanks in anticipation,

Jeff K