Some clerks have difficultly understanding the different screens in MLS. It's possible that the prior ward added your child to the parent's record without creating a record for her. As such, your current ward will see the child listed on your record - but that's just genealogy information. She will still appear there when she grows up, moves out and gets married. IOW, it has nothing to do with her being a member - much less a member of the ward. That would fit with the indication that her record wasn't created properly in the prior ward.
The clerks need to check if they actually have a individual record for her. The quickest way to do that is to do a look up by individual name and see if she's listed. If she's not in that list, then there is no record. They need to create one. Since she's still under 8 years old, that's easy. It's not possible once she turns 8 until she's baptized.
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