What's a "SWM 6" splitter? Typically SWM splitters have two, four or eight outputs. What other DVRs/Receivers are connected to our SWM setup? Be sure that any unused SWM splitter outputs are terminated with 75-ohm termination caps.
A "shadowed picture" is much more likely to be caused by the connection between your R16 and TV. How is the R16's video out connected to your TV?