^When agents list labels (Especially major ones) online most of the time it's just casting one area of the company (Not necessarily all the runways or campaigns) or all past & present clients. For example -- if I remember correctly -- Barbara casts Calvin Klein menswear and not womenswear.
It's better to look at her portfolio instead of the client list to get a more accurate glimpse at which aspect/during which time period of each client she actually works/worked with. Anything of notable mention would be published there, I believe...then you can tell how current that list is