Hi, thank you for playing. When it comes to automatic aligning of structures, you can hold space while placing to place a structure next to another structure if your mouse is over the other structure's hitbox. I hope to make this more robust in the future, but even in its current state, it should be of help.
When it comes to item descriptions, I get that it isn't always the most clear how things work. I should probably rework a few of the descriptions to make the mechanics easier to learn.