Everything is as it should be.
Even with AIs having the options on other Ideologies, they don't always work out. There's also no good reason to 'force' AIs to spread out the choices every game, as that would ruin them every game.
So, when there's multi-layered choices to be made, you can find that 'all' AIs go the same Ideology. It happens, but not always.
Also keep in mind that each Ideology leads to 3 VCs. So you'll see warmongers, techers and culture AIs jump into Order if it's good for them to do it. It's no longer 'clear cut' that the Autocrat is going domination, etc.