you must check the level with the bike upright not on the stand, if you fill it to the level and start the engine the oil will disappear from the window. It is no surprise that when you stop it and leave it a while to settle you can no longer see it in the window (bike upright)...just add some more and repeat the process all it means is you didnt add enough in the first place...repeat the process evantually you will see the level.
The oil quantity is normally on the clutch cover...first off you should have added about 50ml less than this and you would have been in the ball park