You'll need to provide more information on your tables, fields and relationships before anyone can help you.
"the related fields are portals and are visible in other layouts"
Fields and portals are two different objects. Keep in mind that a portal works like a window into a different table where you typically place fields from that table. The relationship you specify for that portal and the key field values (the fields linked by a line on your relationship graph) will then determine which records will be listed in a given portal.
If you are placing a field from a related table directly on your layout, what, if anything, you see will again be determined by your relationship and the values of the relationships key fields.