Great Catch! We never saw that one, because when we were looking for the cabins (missing cabins), we searched around the lake, never thought to look UP! So you are correct, there is indeed a cabin flying in the air at Lake Salmon. You can see the RTMM Cabin below it where that one should have been. Notice there is no white bgl identifier on the cabin (IS3 searches all close by bgl's and identifies each object) ... on our's you will see it is the missing cabins bgl identifiers. So this one is a mystery, we're going to have to do some digging to see where it comes from, I'm betting Tongass.
For anyone interested, you can see it if you position your aircraft at:
N55 34.8724
W132 40.3262
Alt 481
Heading 46.2
We will see what we can do about this one, but it is not something "we" put in or the bgl indicator would be on it telling us it was ours.
Thank you for the discovery.
Doug