I just checked your site both on both mobile emulator of chrome and on my mobile ios phone and I don’t see the changes you are mentioning. I am not sure how you are determining whether you are on mobile or not, because you have not shown any code.
A great PHP solution that I use to determine whether I am on mobile on my site is MobileDetect (http://mobiledetect.net/).
For example:
if( $detect->isMobile()){
echo'34.99';
}
else{
echo'99.99';
}
Anyway, I hope that helpls