{Total:id} Merge Tag not displaying in IE & Firefox

Starting to lose my mind a bit on this one. I have a simple quote calculator form which adds up a total cost based on the options selected.

Upon submission of the form this total is then displayed along with a number of other merge tags in the confirmation message and by confirmation email.

For some strange reason it works perfectly in Chrome but the {Total:30} merge tage displays no figure in IE or Firefox. This field is also blank in the email confirmation if the form is submitted on these browsers. No other merge tag is effected this is the only one.

I have this problem too, but in all browsers.

My forms are paginated, so I use more than one total field, actually 2 for each page of the form (one total at the beginning of each page and one total at the end of each page). I've tried using each one of the totals I had in my forms, but nothing is shown

I'm using Gravity Wiz Better Pre-Submission Confirmation (http://gravitywiz.com/better-pre-submission-confirmation/) and actually anything is working except the total