I think its the same as what you're saying akane. Its just not the same name as I was shown/used to seeing. I know that's a common thing for different breeds on some colors. I think same color needs same name in all breeds to not be as confusing some times.
A_ B_ cch1_ D_ E_ is sable chinchilla, I've seen some call it a shagouti. I *think* its used as (shagouti) well when referring to seal chinchilla (A_B_cchlcchlD_E )and smoke pearl chinchillas (A_B_cchl_ddE_)as well which can crop up in certain areas a lot. I've seen a couple times referred to as siamese sable chins or siamese smoke chins as well. If wrong, please explain as to why so I can understand.