Continuity mistake: When Lestat goes to attack the woman in the park he already has blood on his mouth. (This is because originally Lestat attacked her twice, but this scene was later cut down.) (01:00:55)
Continuity mistake: When Lestat bites Jessie's neck her dress' stripes are down to her elbows, when he lets her down, they're up to her shoulders. (01:22:40)
Continuity mistake: In the scene where the Akasha confronts the elders, when Akasha enters with Lestat her hair is down in the back. When Akasha is disintegrating all of her hair is braided on the top of her head. This is due to the death of the actress/singer Aaliyah. They had to use what they could from other takes during the film process. Also a double with some digital re-enhancement helped with finishing the film.
Answer: There are already way too many characters in this movie. Adding the character of Magnus who would only be mentioned in passing was probably just considered too confusing.
Myridon