Well, perhaps the reason she continues to see these "Shallanspren" (is that what we're calling them now?) is because she is still holding within her a great and deep truth (murdering her father) and not necessarily wanting to bind with her, though one of them may be. After she confesses, we never read that she interacts, communicates, or see the spren within the last few pages of the book. It is entirely possible that after she confessed, the other spren moved on, no longer attracted to her from her great secret. I think this is more likely.