TopoActive Maps Routing on 700i

I've planned a route in Basecamp which follows some local trails and sent that to my 700i. 

I've set up a profile for Trail Riding -

Direct Routing off

Activity; ATV/Offroad driving

Lock on road; yes

Course navigation method; roads and trails

But when I try to load the route on the 700i it just plots a direct route, rather than following the roads and trails. The only way I can get it to follow the actual route is to set the activity type to hiking, mountain biking or cycling, which seems wrong to me - surely ATV/offroad driving should follow roads and trails too rather than direct routing?