Portal not showing all records

I upgrades to rc6 and since then I get something weird.

I have a form with a portal on it. Based on a record that is showing on the form, I create related records with a method. These related records match the relation on which the portal is based on.

Before rc6, when runnign the method, all created lines would show in the portal (normally around 5 lines/records).

But in RC6 only 1 record shows. In develloper I see the records being created in the portal, but each new lines is displayed over the previous one (the first record position in the portal).

Anyone got a clue?

Is this still the case with RC7?

if so can you send me a example solution so that i can look at it?