it sounds like your piggy is very much enjoying her roaming time. We call the running 'zooming' and the jumping/rolling 'popcorning' - they are both sings of happiness and excitement.
It is very normal that free roaming guinea pigs don't like being petted; respect that and interact with her not as a pet but as a equal being and as an independent personality during her free time. She'll still come to you for a treat. Let this time be the one she can teach you about being a guinea pig. You may find it rather fascinating, especially when you consider getting her a same gender companion, so you can enjoy watching the two of the egging each other on with the popcorning and playing dodgems when zooming around. It never fails to make me laugh!