I have an assembly drawing BOM (standard) showing accurate part counts for parts I modeled. I am also using parts (fasteners) imported from McMaster-Carr. The qnty column shows accurate numbers for some of the McMstr fasteners although others have 5-6 digit numbers of which I can not determine their source. In some cases the incorrect numbers are the same for different fasteners. Ex: If you look at the attached, items #14 and 18 show the same numbers (545010). In reality though there are only 8 of each in the assembly. There is a correlation between the two part, that is that they are attach to one another- not sure if that has anything to do with the issue...

Any assist will be greatly appreciated. Thank you.