Indeed.
This is not good:
You have 7 unconnected GND pins. (including the AGND). There are good reasons for having multiple GND pins on a module. You should always connect all the pins.
Yes. Draw wires. the “No Connect” crosses only suppress warnings about not connected pins.
Yes indeed.
I do have a bit of doubt on the AGND pin. Normally it is directly connected to GND too (on the schematic), but on the PCB it’s sometimes routed “specially” to mitigate things like voltage drop over tracks, or maybe some filtering.
Also: You don’t have to delete your post and create a new one. There is a pencil icon at the bottom of your post to edit it:
Actually the deleted post wasn’t in response to your post, that’s why I deleted it. Please any idea how to join the meaning of the symbol on the big box ?
I would start by removing all the purple boxes and labels and connect them to U1 then consolidate all the rest. For instance you have a single 1m ohm resistor with a label GE and a single CAP labelled BAT in seperate boxes 
Nobody can read this ! Your ground issues will be sorted at PCB level because you will apply a copper pour to your GND symbol. I think those green boxes stay there even when you have a label I think someone else said that. Just thought I would say the same things as others just in a different way to see if it helps 
A comment, written in the style of that circuit:
5 - minute trying to find the “SP-PWR” signal
2 - simply because I will waste time
7 - that transistor actually does.
4 - connects to what, and where. For example, I wasted over a
1 - Like many others, I find this style of “little boxes” hard to understand
6 - The way it is show, it is NOT at all obvious what
3 - trying to work out what
(it would have been a LOT easier to understand if there was a “flow” to the drawing, the same as if I had put those lines in the correct order)
Like Piotr, I didn’t waste much time trying to understand the circuit, my brain lost all context, so I can’t really comment on your issues.
You still have terminal 1, labeled PS, connected to GND, and terminal 2, labeled GND, connected to VSUPL. I suspect that is an error.
You have. You have used the same ground symbol. They are connected.
You should explain what that transistor is “doing” so we can help you clarify.
Frim the signal names It almost looks like you are shorting a power supply to ground which is how you let the magic smoke out of the electronics that makes them work.
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