Had the same issue the other day but reloaded and went away. I don't trade much though. Just trying to withdraw what I already have.
It might not be an investment problem per say but rather a problem with the architecture. Usually these sites are build upon a core (an old one in our case) and it becomes quire difficult to fix issues once layers upon layers are build upon. The patchwork doesn't seem to cut it in our case.
As far as becoming no.1, I think it has to do a lot with the design. It is much superior than bittrex's. People usually go for the eye candy. Also, I believe these problems occured as of recently when the traffic spiked. Perhaps they were not ready to handle such a massive market (although their stature should have provided them enough by now to do so).
RE: POLONIEX is basically BROKEN these days. How long until people stop using it?