Those are definitely doubled! I didn’t see anything like that in my spot checks but I wouldn’t rule it out. I didn’t pay attention to counts of comments inside Blogger, perhaps I should have and then doublechecked after import.

Wondering if the date being so close to end and beginning of the year (Dec 31 / Jan 1) caused a glitch in “uniqueness” somehow. That’s pure guessing on my part though.

I wonder if there’s a tool for scanning nodes in an XML document for being identical. Something to check adjacent comment nodes for similarity.

Good eyes, good luck, and I’ll be curious to hear how you resolve it! Thanks for sharing!