I tried stepping through some of the code while debugging, but figured it would be best to have you step through since you probably have a much better understanding of what's happening.

Do you have an email I can forward a link to of the scene for you to investigate?

No worries about the slower response; It's the Christmas holidays, so please relax and enjoy :)

I checked into my project and the LOD is set to 250. I did the "Recalculate Parents" but had the same result afterwards.

As far as scaling, the terrain and player are all 1:1. Some of the trees are scaled down uniformly to fit the scene better. The scaling is done to the prefab of the LushLOD trees in the Output folder generated by your package. The trees were 1:1 beforehand though when I converted them.