Hello @emburr , For your first issue, we have separate column settings for Mobile, desktop & tablet. See it here: Image. From there, you can customize it just like you want.
Currently, we have the option to disable the author only. If you need category and single post disable option you can add this to our feature suggestion option: Feature suggestion
As you can see in the screenshot the top grid is set to one post and one column. Under it has another instance of the same grid block but with 2 post shown and one column selected. But both show two columns not one.
Sorry, I meant the editor view. Please provide me with your mobile device & Desktop column in two different screenshots so hat we can identify the problem. May be you didn’t set any value in your mobile column field.