I think I'm following you here. Portals are notorious for not refreshing when an associated portal filter is altered. The first thing to try is to force a layout refresh with the Refresh Window script step with flush cached join results enabled (you can set this to run from a button on the layout).
Using the Refresh Window script step with flush cached join results is a little heavy handed in most cases (though it usually works fine) so you might want to explore other alternatives such as Refresh Object / Refresh Portal (depending on your version of FM of course).
I do a Refresh Object on the portal with mixed results. I will try Refresh Window as suggested. I work in FMPA 13, so no Refresh Portal .
Will come back with the results.
The refresh Window did it !!! That's my first time working with Filtered Portals, and what a pain.
Thanks again, I will make sure everything is fine - such a lucky guy I am - and will mark your answer as Correct.