Top41 said:

Lindsay and Stella are close? I've not seen a single scene that suggests that. The only moment that was at all personal between them that I recall was when Lindsay and Stella talked in "Zoo York" about how Lindsay was settling in.
The interaction in Wasted, and the interaction in LOLD. They were working cases, but they related differently than either of them relate to the others. I think you also clearly see concern the other way as well in COTP. We don't always see all the interaction that goes on.
It didn't seem to out of place in Supermen. The woman had a major attitude, and we've seen over and over that Lindsay doesn't like it, and tends to get one when suspects give her an attitude. All Access was certainly misplaced anger, but hell, someone he was close to her had gotten assaulted, and she felt helpless. Danny has more than once had what I would consider misplaced anger. Often someone who is really mellow will really lose it when they start, unlike someone who is less so, who a lot of times doesn't escalate. In Stealing Home, the guy was a legitimate suspect, and wasn't exactly being entirely straightforward. And also, I don't think you can fault Anna for doing it that way, because if the director did not want it done that way, she would have been told not to.
And also, people develop and change.
Edited after seeing Radical's post (was typing at the same time): I think part of the problem is that we no virtually nothing about Lindsay's past. All we really know for sure is that she's from Montana, which can explain some things, but not everything. We have no clue why she became a CSI (and can't even really concretely guess), what she's gone through, etc.