In the newest branches of WeBWorK are master (release/2.9) and develop and ww3 (active development of the instructor AJAX interface).
You can track development visually at https://github.com/openwebwork/webwork2/network
and more generally by watching "issues" and "pull requests" at https://github.com/openwebwork/webwork2 and https://github.com/openwebwork/pg
Let us know if you find what is triggering the reduced scoring message and what does not. Better yet report it as a bug to bugzilla (use "report bug" link in WeBWorK). The error message is coming from line 1031 of ProblemSetDetail.pm but it is unclear where the reduced scoring date is being set.