In the final restaurant scene, the same woman wearing the black dress can be seen entering the restaurant twice, once on her own and then accompanied by a man.
Teal had no evidence whatsoever for arresting Groom, other than the vaguest of suspicions. Groom could easily have sued for false arrest.
When Simon is in April Quest's apartment there is a strange Teddy Bear straddling a handrail. In the next scene the Teddy Bear is gone.