Jean Plaidy / Victoria Holt: Georgian and Victorian Series?

I need help with a few Jean Plaidy "Victoria" novels, please:

First: Victoria in the Wings (1972), http://www.librarything.com/work/511849 , is described as the last volume (#11) in "The Georgian Saga" Series ( http://www.librarything.com/series/The+Georgian+Saga ), but our copy clearly states "The First Book in the Victorian Series." The "Queen Victoria Tetralogy" Series ( http://www.librarything.com/series/Queen+Victoria+Tetralogy ), on the other hand, shows its #1 as The Captive of Kensington Palace (also 1972), http://www.librarything.com/work/475288 . We don't have the latter title in our library to compare, but I'm thinking these two are actually the same Work, even if these two Series overlap.

Second, our copy of The Queen and Lord M (1973), http://www.librarything.com/work/1335480 , states "The Third Book in the Victorian Series," but this title is listed as #2 in the "Queen Victoria Tetralogy" Series. Is this a publication order / chronological order kind of difference?

Thanks to any and all who can shed light on these questions. I look forward to hearing from you.

There is some information and clarification on her Wikipedia page
http://en.wikipedia.org/wiki/Eleanor_Hibbert

Thanks for the insight; but I don't see that it adds anything?

If one looks at enough things on World cat it becomes clear that Victoria in the wings comes before The Captive. It is about the race to produce an heir at the end of the Georgian period. Captive is about her growing up before she becomes queen.

That makes Victoria in the Wings sort of a connector between the two series. Publishers will feel differently about where it belongs according to which other books they have in print/ what they think will create more sales.

Look at this site, as well.
http://jeanplaidy.tripod.com/id18.htm

So it seems: (a) Victoria in the Wings and The Captive of Kensington Palace are clearly distinct works; and (b) at least by a preponderance of evidence, The Queen and Lord M is commonly accepted as #2 in the Victoria Series, notwithstanding Pan Books' overt cover statement that it's #3.

This instance precisely illustrates the grave danger of not having enough books in one's own library: in that event, however it may arise, you have no choice but to depend on the kindness of strangers -- and friends.

Thanks to you both!