The birth defects you are talking about are two diffrent birth defects. One has nothing to do with the other. I was told my second son was going to be born with a cleft lip. The risk of a down syndrome child has nothing to do with clefts.
I haven't ever heard of anyone born with both. If someone is, it's by coincidence only. Cleft has no immediate affect on how smart the child is either, though some of us have been mis-labeled as mentally retarded.
Calvero Bron to be Cleft <a href="http://members.tripod.com/~Calvero/cleft"><a href="http://members.tripod.com/~Calvero/cleft%3c/a%3e">http://members.tripod.com/~Calvero/cleft</a></a>
I am uncertain about how accurate the information I've heard is, and I have never heard of any statistics supporting or negating this:
The instance of people with downs syndrome having clefts is higher than others, but the reverse is not true--that the population of persons with clefts has a higher instance of downs syndrome.
My cousin has a child with down syndrome and was told that these children do have a higher incidence of clefts but that doesn't mean that a cleft indicates down syndrome.