Elizabeth Marsh Farnsworth, Farnsworth-1353, is still the mother of all the children of William Reid Rostron, although the couple no longer show as married.
I think the problem was with Caroline Elizabeth Farnsworth Walker, Farnsworth-92, who has a different husband and child. This problem - a "hidden" marriage - seems to have been accurately solved by SJ Baty.
You may want to reconnect the proper Elizabeth Farnsworth.
Also, for the Connection Finder to catch up with the situation you need to give it some time. Connections are recalculated once per 24 hours - but I'm not sure if that goes also for connections to the anchors of the week, that may be done more seldom.