Opens Sans font again

Hi.

We are really struggling with this issue:

We use open sans on the site and mainly use the light weight, so we have added the full range of open sans fonts as you do.

Import Export > Custom font manager and installed this.

Font: Open Sans ( font-family: open-sans )
normal: 300, 400, 600, 700, 800
italic: 300, 400, 600, 700, 800

Then we go to general styling > Heading Font > select the new font

We do the same in the font for your body text

Open Sans (300, 400 , 600 , 700, 800, )

Then in advanced styling > H1 – Change the styling for your H1 Tag

Font weight Light

Same for H2

The page in the private content you will see that the headings are NOT in the light weight font , they are around a 400 by the way they look.

I have another site and you will see that the font weights work there, so why not on the new install?

Please see screen shots and also look at the live correct site compared to the staging site..