But you quadrupled your investment. Come on, be happy with what you achieved. And the chance you would have sold at 5$ is very very unlikely. I would have done the same.
It's still a good time to buy if you believe in a positive outcome.
What broker? I still haven't had an issue with a single sell or buy order. I use Schwab. I also do not place all or nothing orders, which helps to get filled. What brokers are causing you guys problems?