Hello everyone, I'm spending the day with a reletive (who has internet access :D) so I thought that I should make good use of their internet capabilities (seeing that I'm Living in the stone age at my house) and post the information that I promised earlier.
Here is some information regarding the Inconsistency within the Night Sisters trology:
The Clone Wars episode Nightsisters involves a different version of Ventress's background. As an infant, she is said to have been taken from a family of Nightsisters, rather than her original Rattataki species, by a slaver in order to save the rest of her tribe from suffering the same fate. A few years later her master is killed by a group of Weequay pirates who are then fighting a Jedi, Ky Narec. Asajj performs her Force powers on one of the pirates which encourages the Jedi to make her his new apprentice. Narec is later killed fighting alongside Ventress and his death drives her to the dark side. It should also be noted that, prior to and during Narec's death she actually has hair, despite earlier statements that her species was naturally hairless. Nightsisters also depicts Ventress wielding two lightsabers both with green blades before joining forces with Dooku, but Star Wars: Republic 60: Hate and Fear shows her using a blue-bladed lightsaber during and following her Jedi training, and Star Wars: Clone Wars chapters 6 & 7 show her with one green and one blue bladed lightsaber. Ventress' warlord parents, shown in Hate and Fear, are also entirely absent from the new backstory.
Here is some information on the "Eta-2 VS. Delta-7b" conundrum:
One example of a direct contradiction between The Clone Wars and Clone Wars is the use of Eta-2 Actis-class light interceptors at the same point in the timeline Anakin is knighted, whereas in The Clone Wars Delta-7B Aethersprite-class light interceptors are used, which were ostensibly used before the later Eta-2s. In addition, some G-canon elements from works like the novelization of Episode III: Revenge of the Sith are being retconned. For example, in the novelization, Anakin remarks that he has only read about Grievous' Magnaguards in an intel report, despite having fought them in the show. Another very noticeable continuity error is the fact that Anakin has his scar which he received shortly after the Battle of Rendili from Asajj Ventress. He then injured Ventress so severely she was forced to recuperate until the Battle of Boz Pity, after which she deserts the CIS and the war for good. However, as he was originally shown to receive his scar in 19 BBY, yet the series takes place in 21 BBY, this is a glaring continuity error.
Here is an elaboration on the Mandalore issue:
On August 8, 2009, Republic Commando author Karen Traviss stated that she was leaving the Star Wars franchise due to alleged continuity issues raised with the publication of The Art of Star Wars: The Clone Wars, which included information regarding the Mandalorians that clashed with the continuity set up by her novels, most likely in reference to the trilogy of episodes involving Mandalore in the second season (i.e., "The Mandalore Plot", "Voyage of Temptation", and "Duchess of Mandalore") in which the main Mandalorian faction is portrayed as a pacifistic society living in arcologies on Mandalore, which is portrayed as a radioactive desert, contradicting all previous appearances. Leland Chee and Sue Rostoni maintain that the complications will eventually be worked out.
Last but not least, here is some information about the Pre-Mature killing off of Even Piell:
The season three episode, "Citadel Rescue," featured the death of Jedi Master Even Piell, even though the character previously died in the 2008 novel, Coruscant Nights I: Jedi Twilight, written by Michael Reaves. Even Piell lived through the Clone Wars and died during the Great Jedi Purge in 19 BBY on Coruscant in the novel, while in the episode, he died during a mission around the second year of the war.
As you can clearly see before you, there are major continuity issues between the series and pre-established canon. Some conflicts are major while others are minor nevertheless, an official timeline has not yet been established. When the time comes to establish a timeline, we can only hope that they find a way to intergrate the events portrayed in the show with the events recorded in pre-established canon, rather than rewriting the entire clone wars timeline with the content from the show. For now lets just sit back and enjoy the show and maybe, just maybe, Season Four will correct the conflictions season 1, 2, and 3 created. Hopefully, without creating new conflictions.