Consider this kind of a filter on an Account entity. You want to find all Accounts which have a specific technicican named "Cabal" set in the Preferred User field on the Account's primary Contact record. The filter would be (given in the symbolic way):
Status Equals Active
Primary Contact
- Preferred User Equals "Cabal, Jiri"

When you create and save this filter as a custom view, it is saved correctly.
But, after you select this custom view again and click on the Advanced Find button in the ribbon, you can see only the first row of the filter. The rest is hidden.

The exact CRM version is 5.0.9690.3417.