No, the timeline is the following:
Knox made oral statements during the questioning, at the presence of Anna Donnino, accusing Patrick Lumumba. In the first part of the interrogation she denied all police suspicions/allegations that she was lying and covering somebody. Then she was told that Sollecito had withdrawn from her alibi. When she was aksed about the sms message, and understood the police got focused because of its Italian wording, that they thought she was lying about it and thought she had met with someone that night (the unknown recipient of the msg), Knox suddenly accused Lumumba. Crying, covering her ears wth her hands, saying "he's bad" and said they went home together, they wanted to have fun, he wanted her and asaulted her in her room. The police stopped the questioning due to self-incriminating statement, as the qustioning shifted her status to that of a a formal suspect. She signed the minutes of this questioning at 01:45
Then she was given a chamomille tee.
At a time that we can roughly place about 3:00 (very approx.) Mignini came and told her about her status of formal suspect, told her about her rights, and told her that he would not interrogate her but if she wanted to provide them with information so to arrest Lumumba, she could make further statements.
Amanda released an oral statement that was not recorded but verbalized at the presence of the magistrate, the interpreter Anna Donnino and other officers. The statement was finished at 5:54 am and Amanda signed it.
Later in the morning, at about 8:00, Amanda asked for paper and a pen, she wrote herself a two pages memoriale which she gave to Rifa Ficarra saying "it's a gift". She later claimed she wrote this hand written note by her decision, voluntarily, and she gave it voluntarily to the police.
Two days later, on nov 8., Amanda appeared before GIP Claudia Matteini. Because the hand written statement was partly retracting and contradicting the previous statement, while still producing evidence against Patrick Lumumba and also against Raffaele Sollecito, she was asked if she wanted to answer questions by the judge. She decided not to answer. She also decided to not release further spontaneous statements to clarify the previous ones.
Amanda did not make any further statement - nor written nor oral - to clarify anything about her false accusation of Patrick Lumumba, she kept her silence for about 20 days until Guede was arrested.
Amanda was interrogated again on Dec 18., this time by the Public Minister. In this occasion, when she was asked questions about her false accusation of Lumumba, she burst in tears and was unable to answer, and pleaded her right not to answer.