Sync From Ancestry.co.uk and Step Children

Newbie here.
Been using RM for a couple of months and finding it really useful for tracking down errors on my tree in Ancestry.

Just spotted that children who are listed with biological and stepmothers on Ancestry come up on RM as both mothers without any distinction between bio and step.

Is this correct, is this a missing facility within RM or am I reading it wrong somehow?

Thoughts appreciated
Chris