In many scenes, Troi is shown with three full pips on her collar, yet she does not get the full promotion to Commander until several episodes in the future.
When Picard is reviewing Lwaxana's journal and reveals that "there's a seven-year gap," the gap has barely begun to become evident on screen. As the dialog between Picard and Troi progresses, Picard continues to scroll through a list of deleted entries. I.e. he calculates the length of the gap well before he reaches the last deleted entry.
At about 36 minutes, as Deanna is in Lwaxana's mind, she is facing what appears to be a doorway open to space. When the camera focuses on Deana, the shadow of a crew person or equipment passes across the door frame behind her.
Picard says that Lwaxana Troi's journal entries were deleted almost 30 years ago. However, the stardate 30620.1, on which the journal was started, suggests rather that this happened less than 17 years ago.