As far as I can tell, except for the Demonverse 4 & 5 books mentioned above,
http://pspowerbooks.com/books.php?sort=BON lists all books in the correct order (even all the ones with the same publishing date) and the series and position assignments are correct.
In 3 cases where books have been published on the same day, the order (mostly) doesn't matter:
2012-02-21 [DE 001.00] A Very Good Man
2012-02-21 [GF 001.00] Abominations
2012-02-21 [DE 002.00] A Very Good Neighbor
2012-04-01 [Demons 002.00 - Keeley Thomson 02.00] Keelzebub - P.S. Power
2012-04-01 [YA 005.00 - Tor 05.00] Counselor - P.S. Power
2014-12-14 [Infected 009.00 - Brian 03.00] War Day - P.S. Power
2014-12-14 [YA 016.00 - Maria 01.00] Countess of Desire - P.S. Power
As they are from different series and do not contain any relevant cross-reality communications or visits.
I noticed that in cases where a book belongs to multiple series (or rather, what I refer to as series and sub-series) they are listed with the sub-series first, e.g.:
Shortcuts
Other Places - Book 1 / Demonverse - Book 4
The Living And The Dead
Tyler G - Book 3 / Demonverse - Book 16
Hush
The Infected: Ripped To Shreds - Book 1 / The Infected - Book 10
Personally I think it would make more sense to reverse that.
That would ensure that when sorting by series first, e.g.
http://pspowerbooks.com/books.php?sort=SAZBON the books would show up in the right order, instead of e.g. the Eve Benson books before all the other Demonverse ones.