Weird behaviors

HI Nicholeen My daughter has some weird behaviors she's always been very impulsive. Here are some of the behaviors going downstairs in the basement spray painting a cabinet. Making food
Using weird items like pancake mix cornstarch Powdered sugar flour Half a bottle of vanilla . Put in in the waffle maker in burning up. Just recently she started a afterschool program. She really enjoys. But while my mom drops her off at the program she hides on the floor of the car until the kids are gone. Then she gets out and go's in. I thought she was getting over her shines, especially doing her routine in gymnastics all by yourself. But when I get mad, I say hurtful things. Like what is wrong with you? Normal people don't do those things. Especially when it's one thing after another all in the same day. I know that's a horrible thing. You should never say to your children. And the sad thing is she still loves me also wanting a hug. Especially since her mom abandoned her and I'm her aunt but she calls me mom. She's been with me for 8 years she came to me at age 3.5years old and is now 11.8 years. I just Don't understand her behaviors And she has no clue of why. Thanks Maureen PS I will be listening.