exceptional is it:
Even NGC 326 seems to be based on two equal sized Black Hole dark matter nuclei, not able to merge and form a "BAR"in between, just like a Herbig Haro system. It is not: a spiral (NGC1015) but more a "Hoags object" without a spiral.
The Hoags object:
Small Herbig Haro systems based on dual expelled Star spots from nebula..