Nursing off one side for 5 minutes

Since birth my 8 week old has nursed off one side (I alternate breasts), which I know can be totally normal. However, she only nurses for approximately 5 minutes per session. She also latches on and off throughout the duration of the nursing session. She eats about 9 times a day and at her last weight check she was gaining. My first LO nursed for 15 minutes on both sides each nursing session so this feels really foreign to me. Does anyone else's LO do this?