@Alabron, I know you are trying to get into the Taipan, but you might be trying a bit too hard. Take a clue from Amarlei, she is currently in the bar as herself and just having a drink and a meal. Her business was concluded without breaking her cover. She and the dwarf merely talked about the food and their respective trades. Amarlei IS a leatherworker, she advertises as such. She does not run around telling everyone she is a killer.
Your character looks like he is coming on to her and it will likely cause her to just tell him to bug off and she will leave. You have no way of knowing at this point who she is or that she is a member of the Taipan.
The black haired dwarf was her contact. And he knew her because he is one of the top officers in the organisation. They watch people, have stealthed rogues in place to keep an eye out for potential recruits. He is an engineer, he watches people and stays out in the open as an engineer, he does not brag about his kills and neither will Amarlei.
The key here is like espionage, if you are a mole, set in place as an informant and gathering data, you want to be as unobstrusive as possible.
If you are a Master Assassin, you know who you are, you let very few if anyone know your true identity. If you are outed by someone, you would be hunted down, so no one knows who you are. My warlock is playing the part of the Master of the Taipan. But he is hooded and cloaked when he is meeting with his members. Only one knows who he really is, and that is his second in command. All the rest merely know of his shadowy form glimpsed or his voice behind a wall or curtain.
He uses many of his rogues to sit and wait out of sight to gather information. They send him their findings. He sends them gold. They are only recruited by junior members of the organisation, having never met him. There is a box at the bank in Booty Bay that is like a personal mailbox. Think of it like a bus station with private lockers.
Thusly, he will know what you are doing, he will receive a report on the death of the troll. So far, you just need to soften it up a bit, do not be so obviously a killer. Let me post the next part in Amarlei's contract. She will be assigned to kill someone. You will see how she does it.
Think of a way to be subtle about the kill, like a trap in the woods, or leading the mark off into the jungle and dispatching them with animals or something.