High Score Not Retained For Garden Contest

Hello,
Since I've had the Garden DLC (very close to its release), the high scores for my garden contest categories haven't been retained, and it says I have a new high score each time. Is this a bug, and/or is there something I can do to change this? I would like to keep record of my accomplishments and what I need to improve on.
I do appreciate the addition of pros/cons when being judged in the contests, though.
Thanks!

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