Transmission fluid level...
 

Hi.
- After a few days resting on a flat surface, engine off, and at ambient temperature, fluid pours out from the level plug a lot, not a tiny stream.
- Starting from cold and idling, going trough all gears, no fluid at all comes out of level plug.
- After running for an hour, getting home and parked level (hot), no fluid comes out at the level plug.

Is this all normal ?

Is there any symtoms of overfilled ?
Is there any symtoms of underfilled ?
Is it harmful running overfilled, worse than underfilled ?