My Water Bill: Usability Fail?

So after searching for an hour for my checkbook, I set out to pay my last Delta Township water bill. For some reason, they are the only bill I have (had) that didn't offer an auto-pay feature, which is miserable, because that means I have to pay via check. Although that's questionable based on the last bill that I got talking about EFT in some fashion, but that's another story.

And for some reason they failed to include a self-addressed envelope like they usually do. Needless to say, I totally forgot to get the address before sealing the envelope. So at this point, I check the part of the bill that isn't sealed in the envelope. There is an address at the top of the page, but it doesn't say "remit payment here", so do I really trust it? It ends up that I rip open the envelope to verify the address that I'm supposed to send it to.

Which leads me to this: why is the part that tells you where to send payment listed on the section that you include with the payment? In what situation does that make sense? Maybe if you upon receiving of the bill, immediately separate the "please return with your bill" portion and throw the other half away. But does anybody do that? Perhaps it's just me that only separates the two halves as I'm paying the bill. How about, just in case this happens, you put the address to send it to on the part of the form that you'll be able to actually read?

Now I realize that the address WAS on the other portion of the bill, in the upper-left corner, much where I would expect an address to be. It seems plausible though that the address on a company's letterhead could be different from where you send your bill. Maybe my bill paying method is just oddball, that's entirely possible. Regardless, Delta Township owes me an envelope.