I noticed the following and I want to know if it is by design.
Let's suppose you have your
as main site collection (root)
and other site collection that are named as
... ... ...
the feature "search this site" only works properly in the site collections xyz, 123 etc, when performed in the main root, the results of 'search this site' are the same as 'search everything'.
Same goes for the use of content search web part, even if you place as URL where to search the main root (portal.abc.com) the results given are from the whole content of the web application.
Is there something I can do about it to have the 'search this site' performed only on portal.abc.com and not the other /sites/... site collections?