Hello, I found a really weird bug. Can anyone tell me if its real, or if I don't know something important about Hibernate

I am doing a search with Session.createCriteria(). When I add aliases to my criteria, but don't use them, the results change. Here's the block of aliases. When I comment them out, the results change

cr = cr.createAlias("activityDialogs", "ads")
.createAlias("ads.activityMatchCourseUnits", "ads_amcus")
.createAlias("ads_amcus.courseUnit", "ads_amcus_cu")
.createAlias("ads_amcus_cu.course", "ads_amcus_cu_c");

Of course, cr is a Criteria with all sorts of other aliases and Restrictions added to it. However, I don't see how adding an alias (and not referencing it) could change anything.

Am I confused?

Thanks in advance
Peter