Putting a map type inside a control group (type 15) does show some behaviour that is uncommon to every other control type I have worked with so far.
Also all controls inside a control group should be placed at x=0, y=0 at the position x,y of the control this doesn't have an effect on the map type 100/101
b) Dragging the dialog
If "movingenable=true;" for the dialog the map type inside the control group does not move when dragging the dialog around
c)possible other problems: zooming in and out of the map and moving on the map gets unresponsive. I had other controlgroups/ elements in side the space of the map from which most where hidden as I tried it out.