The message says it all: submitted after 1991 by a member of the LDS Church. I have seen some weird ones but this takes the biscuit.
You would be much safer sticking to entries extracted from Parish Records.

Put in the batch number C038041 and for William and Isabella you get the following children
Robert Taggart chr 23 Apr 1809
Isabella Taggart chr 1 Jan 1881

William and Isabella married 14 Jun 1800 Braddan

There were probably children born between 1800-1809 but registered in a different Parish. I haven't checked yet.

Jane