As long as the oil is between the lines, all is good. I dont think I have ever needed to top up after an oil change. One thing I have noticed, is that when the bike is on the side stand, after an oil change is that the oil level is just visible at the bottom of the window. So if you can see oil then all is good.
There is no problem if the oil is slightly above the top line, but not so good if the window is full.