How to put solgan just below the site name

Hello there,
Could you help me about the solgan location.
As most themes do, the slogan normally just below the site name, but i found Amor Azul just a little bit wierd.
when the slogan is short, it will apear on the top of the page, but when the slogan long enough, in some browser, it just below the site name.
please see attached screenshot.

Could you help me? i want to put my short slogan just below the site name.
Thank you so much:)