Unless I'm doing something wrong, when making changes to the default lander for a portfolio it seems to ignore the setting selected here:

Apply to:
Domains using portfolio settings

All domains in portfolio (override any domain level setting)

domains that have had landers specifically set for them are set to the new default even if option 1 is selected meaning I have to go back in and change them if I want to change the default lander for all the other sites.

is this a bug or am I being stupid.

Might be related to the following:

From: DS Announcements
Subject: Customized landers being phased out
Date: 2009-07-31 16:55:27
Over the next few weeks, customized landers will be gradually phased out. Domains using a customized lander in the single lander mode will see that customized lander automatically replaced with the new default lander Internet Circles. Domains using a customized lander in the auto-tester mix will see their customized lander automatically removed from the mix.

If desired, clients who have been using their own customized landers can visit the Lander Selection page at any time and select a specific lander to replace either the custom lander or the default lander that has automatically replaced it.

DomainSponsor offers a wide range of optimized lander designs, including landers specifically designed for popular verticals. As a sign of our commitment to continuous innovation, new optimized landers will be made available for review and selection from within the Lander Selection page each month.

As always, we look forward to continuing to work hard to maximize the monetization of your domains.

not sure, but it has been like this for as long as I can remember - just never got around to asking about it before as I only had a couple of sites running a different lander to the portfolio default in the portfolio. there are no customized landers in this particular portfolio with ds.