I did also try saving to another style and it didn’t work.
It can be hard to tell if it worked or not, especially if the font size is small – but I used Firefox’s built-in Inspector (computed tab), and you can see that it has been overridden:
See screenshot at http://imgur.com/KFrO6d7
A) the computed font-size is 103px
C) the original, saved .alora_huge_white_text edit at 130px, which has been overridden (notice the strikeout).
Could you see whether yours does the same? Mine is RevSlider 4.3.6