Hello,

Your blog design is not the same height due to blog content. You have not added the featured image for some blog. You need to upload images of the same size and proportion. But your column height depends on the amount of content in the blog.

Navigate to Dashboard > WoodMart > Header Builder > there edit your current Header Layout > in that you can edit the Search element and configure the available options related to it:

Secondly, you can go to Dashboard > Theme Settings > General > Search > there you can find options related to Search.

Best Regards.