Merge.outs cannot merge for taxlevel 5(family)

Hi,
They can be classified at the genus level. When I did merge.otus for the family level. The taxonomy output that was supposed to at the family level was actually printed at the genus level. But the OUTs seemed to be merged for the family level, because less number of OTUs were printed for the family level merge than the genus level merge. Also, not all the genus levels were printed in the family merge output. So I guess OTUs were merged correctly at the family level, but it’s just the taxonomy levels were not correctly printed?

The first photo is for the genus level merge, and the second is for the family level merge. I combined the taxonomy and shared results into one excel file. As you can see the taxonomy ouput for the family level merge is at the genus level, but not all genes (e.g. red ones) were included.