Still SAM w/h after 8 weeks of treatment ???

In our facility based SAM tx center, we have observed that over the tx period,along with the weight , the height of a child increases too. At the end of 8 weeks, when the new w/h score is considered, some children still seem to be SAM, even after gaining considerable weight .What is the interpretation? 1. The height is measured incorrectly 2.There is no reason to consider the new w/h score or Any other