Yes, it likely will adjust twice before [TGRLW] delists. However, her current TAG is made up of only two films so when the third one [WINSE] delists her starbond can only go up because of the way TAGs are calculated. Her current TAG is (15,281,286 + 63,059,655) / 3. When [WINSE] delists it will become (15,281,286 + 63,059,655 + WINSE's delist gross) / 3, so her TAG can only increase. (Granted, in this case probably not by much and I'd agree not enough on its own to justify how much her price has gone up.)
But also keep in mind that people don't always "think" about what they invest in. A lot of buying and selling is done in reaction to some news item (like it being announced she's case in [TGRLW]) and a lot of other people will ride a trend like that planning to quickly dump it to make a few quick bucks, etc. etc. etc. Its often less about the reality than it is about the perception.
You'll see a lot of the same price yo-yoing with the Hobbit movies and James Bond #23 as news about what's happening with MGM comes out and get re-reported and re-re-reported.