1. Menu level: We just designed as default, it is just allowed to show the 2nd level. So if you want to show the 3rd, or more, you have to change in code. And remember that we also just support for the 2nd level. If you have the problem for not showing as you want, you have to fix by your self.
=> So, please go to: ...\themes\biolife\templates\header, then select the header style you are applying for your site: http://prntscr.com/nlbsnw then edit this number: https://prnt.sc/nlbm9u
2. Centered image: Please go to Customizing > WooCommerce > Product Images then change again the Thumbnail width like this: http://prntscr.com/nlbt6e => http://prntscr.com/nlbvec
If you are satisfied with our support, would you please spend a little time to give us a good review + 5 stars on website https://themeforest.net/item/biolife-organic-food-wordpress-theme/reviews/22239723. It's really very worth with me.
Thank you,
Yame