Yep...you're reading pressure basically at the pump. The stock location is where you should take readings.
Make sure you have the oil stat orientated correctly...if you are feeding to the closed side, pressure on the filter/block side will be high due to the restriction. Also make sure your filter head is plumbed correctly. Oil feeds in from the outside fitting and exits from the center fitting. On the adapter, oil should be going to the filter head from the outside fitting...oil from the stat should be feeding the motor on the center fitting.
What make of filter are you using?
Make sure you have the oil stat orientated correctly...if you are feeding to the closed side, pressure on the filter/block side will be high due to the restriction. Also make sure your filter head is plumbed correctly. Oil feeds in from the outside fitting and exits from the center fitting. On the adapter, oil should be going to the filter head from the outside fitting...oil from the stat should be feeding the motor on the center fitting.
What make of filter are you using?