"Actual value" is meeting the "Constraint value", but still seeing the DRC (e.g. actual value higher than constraint value for line to line spacing, but the DRC is still present)

I updated line to line spacing constraint value in the constraint manager, and the “Actual value” is already larger than “Constraint value”, in other words it is obviously meeting the requirement of the constraint, but I am still seeing the DRC, see below on the two lines, constraint value is 5mil and actual value is 7.08mil.

when I "display DRC", I see the same thing, "Actual" value (7.08mil) is larger than the "Required" value (5mil)

It is obvious the actual layout is not violating the DRC, but why am I still getting the DRC? 

This is not limited to line to line spacing, this happens on other spacing constraints as well, i.e. having actual value meeting the constraints but still getting the DRC.

How can I resolve this issue? and not by waiving he DRC as I have too many of these to waive one by one. 

Thank you.