I've just seen the following;
"In the Qualifiers and the Championship Shield the slate has been wiped clean and all teams start the new competition with zero points. In the Super 8's Super League the points earned in the first twenty-three rounds are carried forwards into the new competition."
which, as far as the Shield is concern, seems somewhat skewed! for example, after 23 matches Featherstone are on 26 Points and Doncaster are on 2. All points are now cancelled and, in theory, Featherstone could be relegated to Ch1 and Doncaster win the shield
where the points are reset.