If memory serves, the Jedi you encounter on Jaesa's ship mention that Nomen Karr found out about her plans to meet and talked her out of it, then sent them instead.
That's it exactly. Zylixx and Ulldin:
"Well, well. We’re going to have to thank Nomen Karr after all. The Sith showed.”
“Stand down, Sith. The Padawan you seek is not here. Master Karr discovered her plan and talked her out of it.”
“It’s just not your day. You were expecting one lowly little Padawan to crush, and instead you get us.”