the meaning of a portal is 'one to many' - if You don't want to have more than one related record (from that layout..), just place the fields without a portal.
I use this method all the time. Especially useful when you want the see a sorted result (highest amount, latest date, etc) only.
Set the portal size a little larger than the field. Portal format initial row 1, number of rows 1. Then change all the appearance attributes to none (fill, line . . . ).
Hope I didn't leave anything out.
Thanks everyone.I Did it by un-checking the Field behaviour entry in the inspector.My portal is just ment to show saved results and not the creation of new records..