I noticed that, when using opera mini to access a website, both "X-Forwarded-For" and "Forwarded" are sent, i assume you use a proxy to speedup websites, but to my knowledge, if a proxy natively uses the X-Forwarded-For header, it should not allow clients to send Forwarded headers (see http://symfony.com/doc/2.8/components/httpfoundation/trustingproxies.html).
Any application using Symfony framework (which means a lot) won't allow it, except if you ignore those headers (which seems bad). Is this behavior something you wanted (in which case, why ?), or some proxy misconfiguration ?