None of them were the "Sarah" they were looking for, whose full name, they had. It's a common enough name. Comes from the Old Testament.
It would have been very helpful to have been there, and heard the actual conversations, as many times what we are told is lacking in details.
However, it does make one wonder why, if it is such a common name, and there were six girls named ‘Sarah’, why the FLDS members did not admit there were any. IIRC, they told CPS there was NO ONE named SARAH at the YFZ Ranch.
If they also gave a last name, that might explain it.
If they gave all the details when asking, that might explain it.
What do you think of the report that some of the children told CPS that there was that ‘particular’ Sarah living at the compound, and that she ‘disappeared’ a few weeks before the raid?