AFAIK all those Paragon items with added savings throws (eg: 'Improved Saving Throws: Death +X') are not currently working; they don't appear in !list saves and won't improve saves against the actual effects either, according to my quick testing.
I know that's how it works in vanilla NWN. I could be wrong, but my understanding (based on my interpretation of past conversations with devs) was that the intention here was for specific saves to actually boost the normal save when relevant... which can explain why almost every XR has some bonus to specific saves added. Acaos previously confirmed that the bonus saves from Paragon items (though in that case it was for Pendant of Procan) should be appearing under !list saves as well.
From what I remember, if single item has several of same abilities, only the highest one counts. As for Bad Strref, is that the "uni" universal thing? Where as it is each and every save at the same time, if working as I read. With that item you should have +18 saving vs X and having another item giving say, +10 vs death you get +28 vs death. (I also don't remember which saves cap at 25 and which goes to 30.)
Did you try the saves from the ring with same char the screenshot is taken? If so it indeed seems to be bugged.
As for Bad Strref, is that the "uni" universal thing? Where as it is each and every save at the same time, if working as I read. With that item you should have +18 saving vs X and having another item giving say, +10 vs death you get +28 vs death.
'Bad Strref' just seems to be a visual error when examining some of the specific save-types (eg: Law, Chaos). Using !iteminfo reveals the true bonus.
The bonus to saving throws is also visibly bugged and not showing under !list saves.
Just tested it properly now, the 'Bad Strref' ones are consistent with other specific-saves and do indeed work after +20 has been surpassed (as you/Drunkenboaster already explained).
Though I am still not sure whether needing to exceed +20 before getting a bonus was the devs' original plan for these bonuses; as I said earlier, my personal interpretation from Slack was that a specific-save of +X (where X < 20) was intended to apply immediately and be visible in !list saves. Several DC's in Limbo go well into the 80s, so *if* the Paragon items were designed without accounting for the '+20 buffer' before specific-saves begin to apply, this is obviously a balance issue as well.
--APRIL 16-- ssj2poliwhirl [2:30 PM] btw, are bonus specific saves from paragon items supposed to appear in !list saves? i assumed they would ssj2poliwhirl [2:31 PM] but my pendant of procan doesnt seem to ssj2poliwhirl [2:31 PM] ssj2poliwhirl uploaded an image: pendant of procan.jpg ssj2poliwhirl [2:31 PM] am i still getting the bonus saves to law/poison/disease in this case? acaos [3:15 AM] you should be yes acaos [3:16 AM] I think it may be a bug in `!list saves`; will check