From my personal experience the game doesn't like having two logistic assets on adjacent hexes. That being said, not having logistics points remaining under SHQ is usually a sign of your network being overwhelmed by receiving and sending out goods from zones. You can check if you have enough ...

As far as I understand it, asset refers to any construction both public and private. As long as it employs more than two thousand people, it should collect water. This of course only applies if you're running relevant game version.

I assume the cause might be this change:
Changelist 1.21j (#187)
(..)
-Free Water is now only collected in Hexes where you have Assets. If more than 2000 workers/pop working in Hex free water is collected here (less than 2000 is less collection). Remember that the best Hex free water collection has ...

No, already eradicated, and judging by the fact that after certain population point every other civilian economy project is surveillance station I don't even think the syndicate would have enough money for the gasoline and matches.

Private economy assigns money to the surveillance station project, spends it, and the asset construction doesn't start next turn, instead it starts a new project. Money invested into surveillance station is seemingly lost. As the asset itself is present in the "flex asset types" under 4021 and can ...