Unable to change gas/liquid filter element

I'm running into a similar problem it shows all my filters as natural gas even though they aren't.  The real problem I'm having is they aren't even pumping natural gas through as well.  I am not sure what has caused this so not sure of the specifics to reproduce it.  

I'm having much the same problem. it's easily reproducible, if you build more than 2 gas filters, set the first one to a gas and then save before setting the second one, it makes this bug for me every time. The worst is, that it does not go away with saving and reloading, nor with rebuilding every filter I have.