Dumble was sleeping at the time but was woken by police and hotel staff and told to go to her own room.
According to police, she gave a staff member "the finger" and became arrogant and "lippy" as she stumbled to bed.
She was sacked over her conduct, a decision she appealed to the ERA.
Mr Dumbleton concluded that her conduct could reasonably be explained by her being "worse for drink and by her waking suddenly in an unfamiliar place to find she had to leave it".
She was found to have been unjustifiably dismissed and the company was ordered to reinstate her, although she was not awarded any payment due to her contribution to the situation.
Today, Mr Dumbleton ordered the company to pay Ms Dumble $7000 as a contribution to her legal costs and a further $385 for administration costs.