tablepress not responsive for ipad?

Hallo tobias
i use tablepress as a portret gallery so that clikking on it go’s to a page of that artist
it works oke on the computer en labtops but its gives problems on a ipad

when i make 5 coloms only 4 will appear in the landschape position
in the portret position i see 4 and a halve column

is there a solution for it
in the meantime a have chance the number of column to 4 but that is not what i want

can the problem be solved?
this is the page with 4 coloms
http://kunstencultuurwoudenberg.nl/?page_id=103

like to hear from you

regards Adriaan