Hello,

It can be caused for the reason you’ve increased the menu items limit. You have added a lot of categories items. That’s why new items can’t be saved. Here are some explanations:
http://www.wpbeginner.com/wp-tutorials/how-to-fix-the-custom-menu-items-limit-in-wordpress/
https://core.trac.wordpress.org/ticket/14134

Regards,
Rose Tyler.

Hello,

Did you upload background-image for three boxes http://prntscr.com/en3cn6? I need your wp-admin credentials to check this issue.
Please go to Theme Options > E-Commerce > Single Product Page > Enable slider for gallery images > On.

Regards,
Rose Tyler.

Hello,

You’re welcome!

Regards,
Rose Tyler.

Hello,

Please provide screenshot for better understanding.
You can add brands to menu, go to Appearance > Menus > Screen Options http://prntscr.com/en2qri http://prntscr.com/en2r3l

Regards,
Rose Tyler.

Hello,

You need to add Custom font http://www.wpbeginner.com/wp-themes/how-to-add-custom-fonts-in-wordpress/ http://prntscr.com/en1gp9 and write font family to element http://prntscr.com/en1gvq

Regards,
Rose Tyler.

Hello,

As I see, on example site used tabs element and on your site you can add tab widget and then use css or widget options to set needed font options http://prntscr.com/en1cth

Regards,
Rose Tyler.

Hello,

You can add this code in Custom css http://prntscr.com/en11dd:

.navbar {
    padding: 0;
}
.header-type-3 .header .menu > li > a {
    padding-bottom: 10px;
}

Also, see screenshot http://prntscr.com/en113w

Regards,
Rose Tyler.

Hello,

The wp-admin credentials are incorrect. Please check them.
Please change this code

.single-product .email-link {
    display: none !important;
}

to

.single-product .single_add_to_cart_button {
    margin-right: 50%;
}

http://prntscr.com/en0y75
Also, clarify with more details what exactly you mean about different numbers and show us screenshots? Please check if the problem persists with default Woocommerce theme Storefront, install it in Appearance > Themes and activate.

Regards,
Rose Tyler.

Hello,

Could you please clarify with more details what exactly you mean http://prntscr.com/en0pd4 and show us screenshots?

Regards,
Rose Tyler.

Hello,

So, is the issue solved?
The wp-admin credentials are incorrect. Please check them.

Regards,
Rose Tyler.

Hello,

We’re glad to hear that your issue was solved.
Thank you for the notice.

Regards,
Rose Tyler.

Hello,

Please check if the problem persists with default Woocommerce theme Storefront, install it in Appearance > Themes and activate.
Try to disable all 3-rd party plugins and then check.
Let us know the result.

Regards,
Rose Tyler.

Hello,

I’m getting error “ERROR: Invalid username.”
Please check the credentials.

Regards,
Rose Tyler.

Hello,

We need access to your FTP. If you don’t know FTP login details ask your hosting provider support.
Please, also read this article https://www.8theme.com/documentation/xstore/theme-translation/base-theme-translation/ and place these translation files into the languages /wp-content/languages/themes/folder.

Regards,
Rose Tyler.

Hello,

You’re welcome!
Have a nice day!

Regards,
Rose Tyler.