this is getting to be a little frustrating. Last night I measured everything and came up with 5.5... earlier today I measured again and multiple other times until I was sure about the numbers... My eyes are telling me the crank is further forward than the cog, when I site along the crank to the cog it looks lined up, and my measurements show that it's about 1mm off from what it ought to be. If the frame is bent I can't tell, so I've decided to trust the numbers and say it's close enough. I think looking at the chainline from above is screwing with my eyes anyhow...
I measured: 43.5 BB, 42.5 Hub to cog, or whatever it's called.

However, there is still the clicking noise I mentioned. It's not a regular clicking, it's more like a static sound with occasional louder clicks. I'm just wondering how much of that is normal... I sprayed some WD40 on it, but it didn't seem to do much. Is there something special I'm meant to be putting on the chain?

Thanks for the help btw.