Shardcast: The Set, Trell, and Paalm

The relationship between Harmony and the Trellium spikes has been confusing me.  The below is my understanding, not an attempt to declare truth and I hope someone can point me to a WoB or book reference that will correct whatever I'm getting wrong.

Hemalurgy is Ruin's investiture system.  One characteristic of Hemalurgy is that Ruin (and thus Harmony) can see and influence, to some degree, anyone who has a Hemalurgic spike.  The Trellium spikes we see are created through Hemalurgy, and therefore should follow the rules of Hemalurgy and make someone spiked with them open to Ruin/Harmony.  So since this is not true, does that mean Hemalurgy is not entirely of Ruin?  I get that Trellium is a god metal, but why should that break a rule of an Investiture system?  Do we have any other examples like this?

Thanks friends!

1 hour ago, Arthraxes said:

Hemalurgy is Ruin's investiture system.  One characteristic of Hemalurgy is that Ruin (and thus Harmony) can see and influence, to some degree, anyone who has a Hemalurgic spike.

If you go into Secret History you'll see that Preservation also could contact spiked people. Ruin and Kelsier could also talk to mad people. It looks like these abilities are only a side effect of hemalurgy by the damage it does.

Glad you hit on the connection between the Set and The Village. They are both too obsessed with magic genealogy for there to be a relationship. 

My question is are there any other members of the Set/Trellism that are relatives of Wax we thought were dead? At the start of the series we thought Wax's uncle, sister and wife were all dead. None of them were, 2 were working for the Set and 1 was working for Trell.  I hope not, but that seems like a trend. I don't think the grandma is even though she ran what seems to be ground zero for the Set. Wax's mom or dad? 

I've always thought that Trell the craftsman exists to show the origin of the name- The idea is that Trelagism originated from contact between Scadrial and Taldain, so their god ended up getting a Taldain name. And then that somewhat tenuous Connection made it the easiest religion for Autonomy to shape their Scadrian Avatar to match.