LISA’S SPOOKY HOUSE

I have a friend named Lisa, she's 13 or 14, I'm not sure. My sister Sara knows her much better. I was to spend the night at her house, and I was excited. Now, I don't think MY experiences are "ghostly", but Lisa's were! I decided to include all that happened:
Lisa's Dad wakes up every couple hours, and it was about 10 or 11 at night, and he was asleep. So we sat in the kitchen. Lisa's house is shaped like a plane. I'm not kidding. Her room comes down the sides in a long point. And get this: Her doorknob is in the CENTER of her front door. So, we always enter the side door, which is connected to the driveway next to the shed outside. Once you walk in the side door, you walk through a teeny tiny room that has a slideable door that they always leave open, so it's as if the teeny tiny room is part of the kitchen.
In the teeny room, there is a washing machine and a pantry full of food. Then you enter the kitchen. It is nice sized, and has a TV. So we all sat on Alexia's (one of the girls' who was there, along with Erica, Sara my sister, and Lisa's little sis, Susan) laptop and checked our myspace's and prank called some enemies. We were sitting in the kitchen, when suddenly, the motion sensor light outside turned on, and the dog went crazy. We thought we heard a car or something, so we close the blinds on the windows and leaned against the cabinets so nobody could see through the windows and see us.
SI don't know what that was, maybe a possum... well, eventually, we got in bed and went to sleep. And, I cannot remember clearly what happened then... I don't remember if I heard a scratch or a shuffle, but I heard a weird sound coming from the hallway, but I ignored it and fell asleep.
The next morning, I told Lisa, and the games began... She told me it was probably the ghost. I was shocked. I didn't know anything about it. You guys probably think it's no biggie, but just focus on the following ghost stories:
You see, Susan would constantly ask somebody to go with her through the house to go somewhere, like the kitchen for example. Lisa explained it was because she and her sister had been haunted in this house all their lives. Lisa said she USED to scare Susan by jumping up behind her and making a loud hissing sound like a cat, which scared Susie. Lisa said she remembered one night how she was laying in bed, and she suddenly heard a LOUD and real cat hissing very loud, like it was right next to her. Lisa said she almost wet her pants, and was scared so bad. She said from then on, she didn't scare Susie that way, and she didn't hear that cat again.
Next, is her parents bedroom. It is paranormal central. Lisa says she can see weird stuff in the mirrors at night, and ghosts in the bathrooms.
Lisa said that Susan always plays her PSP every night before going to bed. One night, Lisa remembers Susan came in her room at about 11 at night and stood in the doorway or something. Lisa said Susan was really excited and said "Lisa, I got on a really high level and got so many points you won't believe it!" and Lisa said "Susie, it's like, 11 at night, you played for way too long, go to bed and close my door..." But Susan walked away and didn't close the door. Lisa shouted to her to close her door, and eventually got up and closed it. The next morning, Lisa asked Susan why she didn't close her door - But Susan just stared at her blankly and said "Lisa, you never told me to close it..." And Lisa said "Yeah, when you came in my room to tell me about your game..." and then Susan said "But I never came in your room, I was fast asleep..."
Lisa said the ghost really mess with her head big time. Susan has a story herself...
She said one time, she was in the living room watching TV, and a commercial came on. While she waited, she would stare at the little dried up fish on top of the TV. She said she looked at one and it was staring at her, and she found that weird, because she had never noticed he stared in that direction before. She looked away, and then look back, and the fish's eyes had moved! She said she told Lisa, but Lisa didn't believe her. And I think I can believe Lisa because she couldn't have come up with these stories all at once. And she even asked if we thought she was crazy, but I don't.
Does anybody have any possible solutions to these stories?

By Rachel – United States, Florida