Android 6.0 on Nexus 6 not allowing swipe from bottom right and left

I just installed Android 6.0 on my Nexus 6 and yet after watching videos of features of Marshmallow, I find that I cannot swipe to activate the camera from bottom right or the phone from bottom left. What am I doing wrong or are there switches I need to activate so these actions function?

Does your Moto G have a squiggly thing in your bottom Mic ?

Can you guys check something for me ? you might need a magnifying glass, On the bottom speaker/mic do you guys notice a squiggly thing inside it on the right ?

Also on the left looks like its missing a chunk of something. Looks like 3mm is missing or something.

Is yours like this too ?

MI3 New touch screen bleeding at the bottom

I broke my touch screen and replaced touch screen at the authorized service center "TVS Electronics at Ashok Nagar Chennai" India on 22-Sep-015.

When I went home the phone did not turn ON but was heating at the back side top portion.

I went back to the service center and they reset the phone stating there was dust in the charging port. (What it has to with the switching off. I don't know) The issue came up again after a week. This time the service center kept the phone for observation and retuned it. They said they did not find any issue.

But I observed there are 6 led lights visible at the bottom of the phone. This is visible more in the white background. (I have enclosed a photo of this taken from another mobile)

I was told by the service center all MI3 phone comes with this type of bleeding because it is a low end phone. I am one did not notice this in the old screen. In the service center I checked one Redmi phone and it did not have this bleeding. Redmi is cheaper than MI3.

I would like to know whether this bleeding

1] is a normal phenomena of the phone
2] An occurrence happens with some of the touch screen. If so can I demand them to replace.
3] Whether the service center replaced the screen with local make instead of original MI3 screen

Kindly help me.