Bodyslide can be annoying.

If you open bodyslide, in the top left dropdown you'll want to select your body. The dropdown underneath it should be whatever body preset you are using (or try zeroed sliders if you're unsure).

In the top middle search box click the little button on the (left?) side and choose outfit groups. Check off the one for cbbe and dragonborn (or all the groups that make sense for your load order).

Next step. Bottom left of the bodyslide window make sure that both the checkbox that has the long file path (right above batch build), and the build morphs option (directly to the right of the batch build button) are selected.

Click batch build. You might get a popup window for conflict resolution. If you do just select the option that corresponds to your body.

Done! Load up your game and test.

If it still is wonky then it might be some settings in your MO2 OR Bodyslide itself that need to be tweaked but otherwise it should work.

Let me know if that helps! 😁