Instead of bug fix u(opera) provided FCUK#FIX :yes:

No need to Reset TOTAL Data Savings, just current session

To recreate problem, do this:
*Set image quality to low(optional but best)
*Reset Data Savings(Opera Menu > Help > Data Savings > RESET)
*close all tabs

1. Load/open a page/site with high data consumption(www.djmaza.info)
2. Let it load completely(Or stop loading if too much time passed)
3. Check Data Savings.

Report here if Data Overage(optional)

Guyz this page is created on serious issue posted on 1post in a friendly cast.
It's not normal bug.
Back to bug, I understand that some loading pages/websites may be hogging data for loading large images or dynamic content but there should be a way to curb them sucking unnecessary EXTRA overage data than required after all o'mini meant to be as small, as low as fast, as data saver as possible.

The solution can be achieved in two ways.

1. CLIENT Side: A SMART technique in o'mini itself
   And/Or
2. SERVER Side: Opera SERVER automatic page content.....

Fuck up opera, update mini, God know what he'll you doin in.

Or if You can't do this then instead of Showing 0% in data savings page, The app must show negative stats/percentage. (I hope you(opera) would be opting for the solution. Right? Absolutely. So fix the bug)

Opera really doesn't updates to android(opera mini) anymore prioritizing ios & java(ok) and all that hidden consumption is still prevalent all from opera mini 6. From past 1 or 2 years (or more)
It's saved my 80% data( I always keep on LOW image quality) but if this 0%(or -infinity) accounted than I could assume that it saves just 30-to-40%

It's astonishing

Even you may have more strong result than this.
It's 6.2 MB Original Page Size of 27.3 MB. It's huge... really huge. WOW. Like that. Good Play OPERA.
The screenshot shows all. Have a look here >> http://imgur.com/SZdLYRE
Imgur
Post yours too...