Exporting to SVG

Hello, I have a problem for which I can find no answer anywhere else.

I am creating ovals with transparent interiors that need to be exported to SVG and then uploaded to a website for use in a sign making app.  The problem is that when I create the oval correctly in Corel and upload to SVG then the inner oval is not transparent.  Basically I create two ovals and clip the selected objects so that the oval has a transparent center.  If I do this in inkscape and save it then I can upload it to the website and it works as it is exepcted to.  If I save an SVG oval from the web and import to Corel and then modify it and export it to SVG it works.  

I have gone over this every way I can think of and can find no reason why this isn't working.  I am happy to make a video for anyone who wants to see the exact process.  I am super frustrated and I don't want to have to do all this work in inkscape given that I have been with CorelDraw since the 90s.  

I am using Corel on the mac if that makes a difference and I haven't yet tried it on a windows version.  

Here is a link to a video I uploaded to YouTube for anyone who can help with this.  thank you greatly in advance for anyone who tries to help!