That said, my speech habits are slightly odd and tend to pick up the style of whatever I've been reading recently, so I can't really say that I'm representative of American speech habits. *shrugs* If it helps, I live in Pennsylvania.

(and it looks like that number keeps going up...)

It really wasn't my intention to offend anyone. I mean that. Please don't hate me. I just intended to answer the question as best I could, and by the look of things I messed up and wound up offending a lot of people.

I really am sorry.

Since I know KG is in the vague state/geographic area as my dad grew up in, and I could have picked it up from my dad.

...haven't heard it here in Ye Wilde Wilde West. Have heard, however, "I had been going to the bus stop when I saw a man."

...I'd be more inclined to say "on my way to the bus stop, I saw a man" than either of those...

The second version reads like something someone who is trying to sound culture and educated and Veddy Propah would say (the voice in my head had an affected RP accent). Everyone I know would say "When I was going..." or "On my way to the bus stop...".

I think I've heard that before with a contraction; "When I'd been going etc. etc.".

It certainly doesn't seem grammatically correct and I doubt I've ever used it myself, but I do think I've heard similar things before. At the risk of sounding classist, I think it's more of a lower-income-bracket form of speaking (though I am by no means rich), more prominent in poorer areas of the country or poorer parts of cities.