Query not working with particular redirect
By editing and re-saving the redirect page (titled "DDCU" above) the problem is "solved". Why does that fix the problem? How does the redirect page in this one case not get access to the properties, when all other redirect pages don't seem to have that problem?
>> Why does that fix the problem?
Because by the time you re-save the page, the page is recognized (which by then is a synonymous) as a redirect and the target source starts to inherent the redirects properties (only direct redirects count, a redirect of a redirect will have no effect).
>> How does the redirect page in this one case not get access
I don't really remember (haven't looked at Store3) but what normally happens is that when you initiate a redirect of a page the container (with all its properties) gets delete from the the database and only after a job run/or re-save (see above) this page is recognized with an internal state of "_REDI" which makes the redirected source properties part of the new target page.
Also there is a difference of doing a page move (including a redirect) and just doing a redirect (#REDIRECT) which involves different code to be executed. For a more closer look of the inner workings of the redirect handling see SMWSQLStore3Writers updateRedirects() and changeTitle().
