I just want to add a quick note about a certain type of spawner that you will definitely run across if you download lots using the garden trellis that came with the greenhouse venue (the one that auto-waters your garden, with the composter on the one side).
The garden trellis has a seed spawner attached to it, under the composter, on the one side. That spawner has a "Do Not Use" (or something very similar to that -- I don't have my game open to check the exact wording) notation. It is a spawner, and so it multiplies like any other spawner. But it also has one other attribute: the special spawner regenerates where ever the garden trellis is located.
So, for instance, if you try to delete the garden trellis "Do Not Use" spawner that is under the composter in the garden trellis it seems to delete like normal -- but, the trellis will automatically regenerate the spawner in that same location, the next time you open your lot.
What this means is that it is impossible to remove that particular spawner before uploading a lot to the exchange. It will always regenerate when the lot using the garden trellis is installed in the game. And it will always multiply if the lot is rotated.
Even the greenhouse venue downloaded from the store has the problem. In fact, that lot is loaded with extra spawners, because someone on the store team forgot to remove the extras before uploading it. It should only have ONE of those spwaners right under the composter. All the extras should have been deleted before the lot was uploaded by the store team.
So, from the standpoint of the user, you should definitely delete any of these "Do Not Use" type spawners from any lot EXCEPT for the one spawner under the composter. There should be ONE of those. But lift it up to see if several of them are nested one on top of the other. Delete any extras. You only need one.
All of which means that anytime you see a garden trellis from the greenhouse venue on any lot you download, do a testingcheatsenabled true and buydebug on so you can locate and delete any extra garden trellis spawners from that lot. The creator of the lot is not responsible for those extra spawners, because the creator cannot delete them prior to uploading. It will be up to the user to make sure only one exists on the lot, after placement.
I did once mistakenly delete the spawner under the garden trellis composter. I was removing all the spawners from the lot before saving it to my library bin as a spawner-free lot. I about choked, because it was too late to undo, and I thought I had ruined the function of the garden trellis. I put it in the library bin anyway, planning on just replacing the trellis, when the time came. But when I placed the "empty of spawners" lot from the library bin back into my game, the trellis had regenerated the spawner (and multiplied when I turned the lot during placement). Which is how I found out about the auto-regeneration of that particular spawner.
