Normal rabbit behaviour. Does have several escalation steps when sorting out their hierachy, Evil Eye, shooing, humping, circling, short bursts of chasing, plucking fur from each others behind, real chases, full out fight.
So, your does are not neutered, and in puberty (between 3 and 8 months), right? That behaviour shows that there are tensions, nothing critical yet, but have an eye on it and maybe adjust some things.
I keep all my rabbits in pairs, currently one group consists of 11 rabbits, 2 does (3 and 4yo) and 3 litters of which one doe is 6 months now. What makes that work for me is that they have a structured space, 3 hutches connected with tunnels, so if they feel like it they can get out of each others eyes, and each adopts a corner as her space while the rest is common ground. Also, they are out in the garden (ca. 200m²) during daytime.
I would divide their living space with 2 openings to get from one to the other, and make some places that are higher up and only have place for one rabbit, and also hidey houses (at least two openings). Avoid any dead ends.
A lot of that behaviour is triggered by hormones, so getting them spayed might be a good idea.
I'm very cautious about seperating. If you can get them spayed soon, and the situation doesn't get worse, I wouldn't. But as I said, I give my does the opportunity to get out of each others eyes.
Anyway: Check their sex. Sexing them wrong is so common that we attribute it to the Sex Change Fairy (a fat guy in rainbow fairy outfit). Even after 10 years of breeding rabbits I still ask for a second opinion when sorting out litters.