I know. I'll look at that link but what I meant was the fact that he kept attacking after I paid him seems like a bug. He doesn't give any hints of playing foul that Obsidian makes very clear when it happens.
First time I played, I got vilified by P. Gangers at the beginning. Same thing happened to me: I came to gate, paid for entrance then got attacked when trying to enter. Yes, its somehow surprising and probably not how it should have work. What is probably happening is that dialogue initiates, you are offered chance to pay for entrance but then when you get closer you are identified as archenemy and attacked.
If your reputation is not too bad, you can enter.