Do They Do Multiple Shots in One Single Scene?

[Seedlovers]

So, I watched an old movies today, it's a compilation video actually. And because it's compilation, I watched it along with the original movie, you know sometime in a compilation movie, they cut it due to whole movie duration, or sometime it even have more than the original one. It's pretty standar you all know that.
But, I notice more than that, the ending of those two is different. I thought it just shot with different camera, but it's not, it's not just camera angle, the position are different, even the conversations are different, one are just simple "iku.. iku.." and the other one says "come on, put it inside me.. (of course it's in Japan, I'm just assuming she says that.. )
Here are the GIF to see what I'm talking about.
This is the original one:

and here's the compilation one:

different, right? So, they obviously did multiple shot, my question is, what is the purpose of they doing that? is it something to do with fake cum?
have you guys ever notice something like that? please share your thought!

 

[periph]

it's possible they redited using additional raw footage that they didn't use the first time.

 

[Seedlovers]

it's possible they redited using additional raw footage that they didn't use the first time.

I'm aware of that, I know the fact that they reedited the original video and replace it with they didn't use in the first place.
my question is the purpose of doing the retake after he ejaculate on her pussy.
Is it because they thing the first one isn't good enough?
Is it because the initial concept is to do multiple nakadashi, but they remove the second penetration because they think one nakadashi is enough?
and is this thing is normal in jav industry, this is how the way they do it.

 

[Seedlovers]

I think I figure it out.
Since the massive leaked videos were out, I've learn a lot about fake ejaculation and fake nakadashi, I took a look at the videos that I thought had real nakadashi and found out all of them was fake because I saw clearly now that they were using condom during the intercourse, there's cut in between, even when there were no cut, they just zoom in to the pussy but very low position, so we can't find out that they can pour the fake cum to the pussy.
So I think it's about fake nakadashi. they did a shot, but think that is not good enough to fool us then take another shot.