Following is a response from Senior DHS Specialist, Tom Pullum:
You have to include h9=4. Here is Stata code to produce C (reported by card), M (reported by mother), and CM (reported by either);
gen C=0
replace C=1 if h1==1 & (h9==1 | h9==2 | h9==3 | h9==4)
gen M=0
replace M=1 if C==0 & h9==2
gen CM=C+M
summarize C M CM [iweight=v005/1000000]
It is helpful to enter "tab h1 h9 [iweight=v005/1000000], m cell" in the KR file. That table has many logically empty cells. The recodes above show how the non-empty cells count toward C or M.