Unexpected "Conflicting Rows" on GDT with 'greater than' and 'less than or equal to'

package com.myspace.ccd_project;

//from row number: 1
//Standard customer low risk
rule "Row 1 risk-evaluation"
	dialect "mvel"
	when
		holder : CreditCardHolder( status == "Standard" )
		data : FraudData( totalFraudAmount > 0.0 , totalFraudAmount <= 100.0 )
	then
		data.setDisputeRiskRating( 0 );
end

//from row number: 2
//Standard customer medium risk
rule "Row 2 risk-evaluation"
	dialect "mvel"
	when
		holder : CreditCardHolder( status == "Standard" )
		data : FraudData( totalFraudAmount > 100.0 , totalFraudAmount <= 500.0 )
	then
		data.setDisputeRiskRating( 1 );
end