Tolerance limit problem

Hi all ,

I've set a tolerance limit config. in " vendor specific tolerance limit " ... made that , both - upper & lower limit by 50 ...

and done all the necessary setting in OBC3 , OBC4 , OB57 ...

but , when I was going to run MIRO , for an invoice where decided that invoice variance should be within ( -30 ) which is lying under my pre-defined tolerance limit in " vendor specific tolerance setting "  -{ from -50 , to + 50 } .......

but , it displayed an error that " balance is not zero 20 ; debit 7280 , credit 7300 "  -

message no : M8534

my question if i set tolerance limit within 50 , then 20 lies under that limit ... so , why error message has been displaying ?? ......

Regards

Patel