Gladness can't attend to all customers equally

My friends and I went to wimpy keywest to get breakfast, when we got there it was full. At the door there was no1 to attend to us, we went to look for seats and there was a family that was about to leave, 1 of waitresses said we could wait for that table. When the waitress was done cleaning up the table Gladness (who is the manager) gives the table to other people who came after us and we telling her that we were waiting for that table. She gave us attitude telling us that we just passed her. She should have come to us to assist us with finding seats instead she gave us attitude, that is not how customer service should be especially coming from a manager!