ky331,
From your posts here I can tell that you at least technically understand what is happening here. However, I'm not certain that these differences between Spybot S&D and SpywareBlaster are being understood at a philosphical level, nor how easy it is for you to resolve them without changes to either program's database.
Though in the past both programs have appeared to always agree on the status of 'blocked' sites where they overlap, on occasion there have been differences, though generally temporary as you've mentioned. Though this may not really have changed, it's completely possible that it might, so I don't believe we can assume the programs will always attempt to remain 'in sync'.
Since the philosophy of what is a 'bad' site that requires protection is highly subjective, it's common for different security programs to have wildly different opinions and thus different sets of similar protections in place. Though in some cases these differences merely 'overlap', in others they can appear to 'conflict' as in this particular case. However, this situation isn't really a 'conflict', since neither program's operation is actually affected, it's simply a difference of opinion on one (and over time potentially more) site(s).
Since Spybot S&D contains the [necessary] ability to remove old 'orphaned' entries that have changed so they aren't forever left in the registry, when an entry is removed from the blocked list it will also be removed from the registry during a fresh Immunization, which you have noticed. So if Spybot S&D is run after SpywareBlaster, it will remove any corresponding entries that the Spybot Team have decided to remove the protection for, no matter what the reason.
The solution here is obvious. Simply decide which program of the two you wish to 'trust' the most, or alternatively whether you prefer the 'most' sites blocked or the 'most selectively chosen'. SpywareBlaster's list has always been larger, but has also seemed to be slightly less well maintained than the Spybot Immunizations, though this is just personal my observation not deep analysis.
Once you've made this decision, simply execute the program who's selections you prefer most last. This will result in either the removal of one or more individual Restricted Sites entry by Spybot S&D or the combination of all sites contained in both if SpywareBlaster is executed last. This solution is simple and removes any concern for differences between the two program's lists which will continue to occur as the lists evolve.
Bitman