1. Yes. Proxies from different countries = you're done if they look your way
2. If you can't get in, then it's not a really fast reliable proxy. It's a dud - looks good, but completely non-functioning (or doesn't exist). The problem with free proxies are many are slow, sketchy, or unreliable with frequent disconnects. Keep looking, but don't expect to find a perfect proxy out of the blue.