Hey @GoldenRod
Welcome to our community.
Additionally to what @Jim1 said, we introduced a few limitations to fence foundations, bringing them closer to what their initial design was as they were used widely in exploiting.
Apologies for the frustration and thanks for your feedback.
They do, but fence foundations are the ones most dramatically affected by these changes, with one of their sockets completely removed.
We’ll reconsider rewriting the new placement rules so they can be modded once we’ve found and verified a way that will not open the gates for abuse. We think in this case, and at least for the moment, it’s the lesser evil as the exploit the new changes covered was devastating.
In this case, the expression “this is why we can’t have nice things” sadly applies 
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