Roundabouts in OpenRoads

I'm trying to create a roundabout in OpenRoads loosely based on Stockdale. I've created the roundabout using traditional MX methodology (i.e. input files, strings, etc.) and am now in the process of moving this into OpenRoads so I can create my 3D model. The means by which I'm doing this is by creating corridors for the approach roads, the entry/exit for each arm, and one for the circulatory carriageway (if anyone knows a better means of designing a Stockdale roundabout in OR I would be extremely eager to hear from you!)

I'm having trouble creating a point control for my circulatory carriageway corridor, where it seems to be having a hissy fit with the proximity of one side of the roundabout to the other creating overlapping corridor edges. The screencap below shows what's happening:

Does anyone know of a way I could stop this happening?