Logic Puzzle April Fool's Day

based on the books by the awesome J. K. Rowling
April Fool's Day

Harry looked up from his steak and kidney pie as Fred and George approached the Gryffindor table. Both of them were walking as though picking their way through Professor Lupin’s dark creatures obstacle course.
"Hi," said Hermione, her mouth twitching.
Fred and George didn’t reply. They were too busy shaking their chairs, running their hands up and down the chair legs and examining the undersides of the seats.
Ron sniggered. "What’s the matter? Afraid someone hexed your chairs?"
Harry tried to keep a straight face, but when he saw Professor McGonagall shoot a severe look at the twins and lean over to whisper something to Dumbledore, he lost control. He burst into laughter and had to clamp his napkin over his mouth to keep from spraying the table with bits of meat.
"Weasley’s Wizard Wheezes will have their revenge," said Fred, sitting down and gingerly prodding the dish of potatoes as though he expected it to explode.
Lee Jordan erupted in mirth so loud that everyone in the Great Hall turned to look at him. "Who are you going to get revenge on? You don’t even know who’s guilty."
"We’ll figure it out," said George grimly. "And woe betide the fools. . ."
Unbeknownst to Fred and George, the Weasley family, (Ginny, Ron, Percy, Bill, Arthur, and Charlie) got together with Madame Hooch, Professor Dumbledore, Professor Sinistra, Filch, Madame Pomfrey and Hagrid to turn the tables on Fred and George.
Fred got tricked twice, as did George, and twice Fred and George were caught together.
Fred and George (either individually or together in no particular order) were surprised to find homework disappearing from the desk, turning into a canary, a "Hex Me" sign stuck on the back of his/their robes, forgetting his/their own name (am I Fred? Or am I George?), and one team fixed it up so that instead of speaking, every word came out as an Opera aria. Professor McGonagall was not amused when a powerful love potion was used and she was the object of desire! Unfortunately for the Twins, all of these took place in rather public places (common room, breakfast, charms class, transfiguration, lunch and a school assembly in that order).
Help Fred and George find their tormentors with the following clues.

1. Dumbledore was not in cahoots with Bill. Sinistra did not help Charlie.
2. The homework trick and the canary trick caught the same person (or people).
3. Fred was spared singing any opera at all.
4. The six tricks were the one played by Hagrid, Percy, Bill, Madame Hooch, the one at breakfast, and the opera singing.
5. The love potion involved only one female (besides Professor McGonagall, of course)—but not Madame Pomfrey. (FYI Professor Sinistra is female)
6. The only Weasley Filch was willing to work with was Percy and their trick went down before Dumbledore’s.
7. The following tricks happened in this order: Homework disappeared, Name(s) forgotten, Arthur Weasley got revenge and the love potion inspired poems, flowers and candy.
8. Ginny’s trick was immediately before the canary trick and Filch’s was immediately after the canary transfiguration.
9. Bill and Charlie managed to get both of their brothers. And Bill got them during transfiguration class
10. Hagrid finally got George (only) back after years of fantasizing about it.
11. Madame Pomfrey finished her trick before Professor Sinistra finished hers.
12. The "Hex Me" and the Canary were played on different individuals.