The R-0011L is typically added in excess of the amount needed to bind with the calcium ions and turn from blue to red. Because you add an excess, the resulting color at addition is somewhat purple (red + blue). If you were to add lots of extra indicator, you’d get more of a blue color than a red color and it would be harder to see a transition.
I don’t think 1 extra drop will matter much, but don’t go beyond that otherwise the color transition may be harder to see. Changing the background color using a white towel or a white paper plate might be more helpful.