Legal Question in Personal Injury in California

Your question is not clear what you mean by filing individual claims. Typically all the claimants would be included in one claim with the insurance company. It is unclear if the insurance company has different claim files, but that would be doubtful. It is acceptable to settle certain individuals and leave the other more ocmplicated claims to be resolved when the documentation and injuries have been further clarified.

Assuming that the policy limits are sufficient to cover all three claims, I see nothing wrong in what you have described. If the limits were nearly exhausted by the first two settlements, then there is a possible conflict of interest, of which the three clients should have been advised and waived the conflict in writing. I see no reason to assign three different claim numbers to the same accident, but then I see no harm in it either.