If it's all under your base bricks, then that will always happen.Also remember to save ownership and to not load under "Yours"
I load using the /dediload mod if that makes a difference.
Saving bricks that are built on someone else's baseplate makes the bricks the baseplate owner's bricks.
It may be the problem
Correct, loading function has changed since that mod was made.
I was in someones dedi server and build a brickscape hill, the next day I came on some of it was the hosts ownership. I asked the host and he said it was dediload messing up or something.