And whenever you "knit" through the back loop of a stitch, you get... a lump on your side of your work. In other words, it's identical to a purl stitch.
I'm not sure what you are saying here. When you knit in the back loop of a normal stitch it twists the stitch, but it is still a flat, vee like stitch, not a purl.
When I put stitches back on the needle after ripping out a few rows (and I've ripped back to a knit row) I don't take a lot of care in how I seat them on the needle. Then as I knit that first row if the stitch is seated correctly I knit it regular, but if it is seated backwards I knit it into the back loop and that straightens it out to a regular knit. It doesn't become a purl.
In the quote you have the word knit
in " " marks, so maybe you meant something a little different than what I got out of what you said. Any clarification?