registration and login modules not displaying properly on purity iii template for mobile

hello i'm switching to a purity iii template and am trying it out, but it seems there's a layout error when i'm trying to run a slideshow type content on the same page as the login+ registration module.

the login module overlaps the registration module on my mobile view. It looks fine on desktop view, but when i view on my mobile phone, it's overlapping.

may i know how to resolve that issue ?

thanks!

regards
alex