Here are your answers.
1) It bugs sometimes, it should be fixed now.
2) Staff members are online many hours per day. Usually we stay vanished as skyarmyfan11 mentioned above because it is way easier for us to spot cheaters without them expecting us. If they could always check when we are on, I'm pretty sure they would not be hacking that specific time.
I don't know exactly wat you mean... But it's probbably, like Hakuna said, 1) Your connection / server connection(/issues) and 2) Staff are busy w/ maintnence, and are in /v so they don't have to worry about players asking them things
We always respond to players that need help. That's basically a part of our job. We never ignore players when they ask about something. I will explain you for the last time that we stay in /v to make our job more efficient. I'm really sorry if you still can't understand.