^I think the common thread with all those things is that reality hadn't changed, just people's memory of aspects of it. They either didn't think to consider those discrepancies in their past or they came up with ways to rationalize them. If you grilled them about those questions, they'd probably start thinking about them and be confused, but otherwise it just hasn't occurred to them. Part of the forgetting is that they forget there was anything they've forgotten -- the spell or the change in reality makes them accept the altered state of affairs as normal.
Not quite the same thing but it reminded me of it:
"Everyone's memory is a mess. Life is a mess. Everyone's got memories of a holiday they couldn't have been on or a party they never went to or met someone for the first time and felt like they've known them all their lives. Time is being rewritten all around us every day. People think their memories are bad but their memories are fine. The past is really like that."
It was definitely amusing seeing Tamsin act like a teenager.
The wings were cool, as was the revelation that this is her last life.
Her last life? Really? Couldn't she get a new set of regenerations from the Time Lords?