Can you try to remove class attr from this:

http://52.37.86.191/wp-content/plugins/vc-price-table-month-year/assets/vc_pricetable_monthyear.css

.vcmp_my_pricing-wrapper .is-visible {
position: relative;
z-index: 5;
}

change by:

.vcmp_my_pricing-wrapper .is-visible {

}

This will be solve the issue partially.