Clarification on turning off Auto-Invest?

So I thought I got a grasp on how to sell on this platform but it doesn't seem to be working like I would hope.

1. I turned off Auto-Invest.
2. I went in and selected a few securities I would like to sell off.
3. It flags those as they will be sold tomorrow.
4. It then populates a list of other securities that it will buy at the same time with the funds from the sale.

I did not want to buy those specifically at this time. Is it always going to try and buy the underweight slices, even if I turn off the auto-invest? Or did I do something wrong?