It is incorrectly stated that Maul's first encounter with the Jedi is when facing Qui-Gon on Tatooine. However, Maul had faced Jedi before, such as Darsha Assant.
It states that a rogue Jedi started the Sith, when is was actually a group of Dark Jedi.
When Order 66 was executed, it said that Yoda and Obi-Wan were the last of the Jedi, when there was still survivors, like Rahm Kota. It even goes against itself by later stating that Shaak Ti survived.
Although it correctly states that General Grievous was taken to Geonosis, it says he was operated upon by Geonosian scientists, although it was droids. Later, it states that Anakin's burnt body was taken to Geonosis, but it was Coruscant. It says the same thing happened to him as General Grievous, but droids operated on him, not Geonosian scientists.