The One With Christmas in Tulsa - S9-E10
Audio problem: In the scene before the opening credits, if you listen carefully to Chandler's line, "If I don't get it done, I'll be fired", you can tell it's an overdub. The background noise and volume levels are different than the rest of his speaking. (00:00:33)
The One With Ross's Inappropriate Song - S9-E7
Audio problem: When Emma laughs right before Ross comes in, the laughs don't match with her lips.
Answer: The painting doesn't have a name, and if it does it is never mentioned in this episode.