My late mother would not have bothered to record anything so trivial in her view. Don't misunderstand me, I think it's lovely what your mum wrote, it just shows how proud she was of you petallus.
If I got a merit, in piano for example, it ought to have been a distinction. If I came 2nd in the year then that was not good enough and all praise was faint. My friends never met with her approval and she tried to push me into befriending the 'rich' girls instead. My father was bad mouthed behind his back and later to his face.
I envy you being tearful for a mum who isn't there any more. It showed you had a loving relationship. When my mother died, by her own hand, my over-riding emotion was relief.