CoordinateDeformer::deformPoints has the following code (sorry about the formatting - this editor removes indents):

if( is_touched[0] ) {
H3DFloat distance = (resting_points[i] - touch_points[0]).length();
offset = ( penetration_points[0] - touch_points[0] ) * f->get( distance );
}
H3DFloat max_depth_sqr = offset * offset;

for( unsigned int j = 1; j < nr_devices; j++ ) {
if( is_touched[j] ) {
H3DFloat d = (resting_points[i] - touch_points[j] ).length();
Vec3f o = ( penetration_points[j] - touch_points[j] ) * f->get( d );
if( o*o > max_depth_sqr ) {
offset = o;
}
}
}

Note that max_depth_sqr is not reset when a new offset is assigned (near the end). This seems to result in the only last offset value being used, not the one that is the largest. Especially when device[0] is not touching, but device[1] is touching. Then max_depth_sqr stays as 0.0 the whole time. So the very last touching device's offset is used, not the greatest.
This results in unexpected behavior with multiple devices.
Seems like a bug, but I'm not sure.