I foster kittens quite a bit. What you are describing is typical kitten behaviour. I even have kittens aged 5-6 months at times that do exactly what you are describing.
Follow sugarcatmom as she is one of the most savvy cat person here along with 14+K and Love4Himmies.
I am just a foster mom but I got alot of useful information from these 3 people on how to work with fiesty kittens and even got support for a feral kitten who is now safely in a home and loved to bits.