Collector's edition achievement

[sara_lyn1]

I was working on collecting all 625 collections items recently. I had 616, went into Henrietta's Hideaway, and as soon as I FINALLY found and collected the item in the chest, I got the achievement!!! I was thrilled because it was the final achievement so I now have all 45 achievements, but it was also bittersweet because I technically still have 7 collection chests left to find. Has anyone else experienced this?