Landfill being delivered to storage chest [Mod Weirdness][Not A Bug]

[Illiander42]

I have a number of filtered storage chests (filtered to Sand3 (It's SeaBlock, so it's essentially landfill)) and I have placed large amounts of landfill blueprints and paving blueprints.

The landfill is somehow being delivered to the storage chest and there is no way it should get to a state where that's possible. It's not going there when paving is being applied, because there isn't enough being delivered for that to be the cause (I'm paving everything)

I have no active or passive provider chests, no requester chests, and no buffer chests (and none of the bigger ones SeaBlock gives you). Just vanilla storage chests and blueprinted tiles. I have not researched a robot carrying capacity upgrade since long before I put these blueprints down.

[Jap2.0]

Some of the tiles on the naturally generated islands can have sand placed over them, but then return 1 sand when you do so. I'm not sure why this is or if it's intended (but it's possibly a seablock problem, not a base game problem).

[Illiander42]

Oooohhh... Now you bring that up, that would explain it.

It's Landfill Painting that does that, I think because it's changing which sand tile it is.