www.wysiwygwebbuilder.com

This requires a custom script.

I am not sure but it may be because you have used unsafe links.
Your website is using 'https', but some of the links are 'http'
Change all links to 'https'

Also, I recommend to use lower case filenames (jpg instead of JPG), because some server have a problems with uppercase.

With layout grids the column height cannot be equal unless the content is equal.
That is one of the reasons why flexbox was invented...

It looks like you have already fixed it?

Did you publish all files?
What is the URL of the page?
And where exactly do I need to look to see the problem?

Maybe the image file names are not valid/web safe?
http://www.wysiwygwebbuilder.com/forum/ ... f=10&t=131

It looks better now.

Maybe one of these solutions will be useful?
http://www.wysiwygwebbuilder.com/forum/ ... 10&t=57726

"cover + fixed" is not supported by some mobile browsers:
See 'known issues'
https://caniuse.com/#search=background-size

If you use breakpoints then you can set a different background mode for smaller screens.

I have found the following issues: - the content is not center in the available space in breakpoints. - 'include min width' in Manage breakpoints is not enabled. See the FAQ: http://www.wysiwygwebbuilder.com/forum/viewtopic.php?f=10&t=63817 Also, I recommend to set the Output format of the text obje...

To be able to help you, I need the project file so I can see what you have done.

See also this related FAQ:
http://www.wysiwygwebbuilder.com/forum/ ... 10&t=82134

There is a scrollbar at the bottom of the page, this indicates that there are objects outside the page boundaries.

See also:
"There is a large is empty space at the bottom (or right side) of my page"
http://www.wysiwygwebbuilder.com/forum/ ... 10&t=63817

You can make the banner any size you like.

What is the URL of the page and where exact do I need to look?
What are your exact settings?

I'm sorry, I do not have a standard solution for this.
But if it can be done with standard HTML then you can also do it in WWB and custom code.