Clashes between controls

I have set up some font controls but they appear to be unstable. I have had this issue before and you helped out

For Example div.title-area p.site-title a and .shopp-product p appear to be related in some way.

I have tried altering the force option but as far as I can see it does not help

Thanks in advance

https://ww.wp.xz.cn/plugins/easy-google-fonts/