Known SMW bugs
Semantic MediaWiki is a cutting-edge tool (| semantic web is not yet here, but SMW is one of the instruments using which researchers hope to create/understand/shape it). So, often it's not very user-friendly (you noticed this, isn't it?) and even has some known bugs. Moreover, the way in which it has been used in AIRWiki can introduce its own bugs and problems too.
Below is a list of known issues, and -where available- instructions about solving them.
In the page of my (whatever), the "Description" field begins with "prjDescription=[["! How can I remove that?
Well, this is a known issue, associated to the use of square parentheses in the "Description" text. You simply have to avoid using [] in the Description. Yes, unfortunately this also means that you cannot put links into the Description. You can put the links in the free wiki code that you can put at the bottom of the page, after the initial semantic part (i.e., the part between {{ and }}).