BlackBerry Z10 OS 10.3.1, System battery usage 48h - 50%

So first of all I'm a newbie arround here but I ensure you I do understand how this phone works..
My first question is, is it normal that if the week just passed after I just instaled the update for OS 10.3.1, to have a 49% System battery usage on an 48 Hours interval ?
Second question is, is it also normal after this week pass, to have arround 45% Display baterry usage in the conditions my luminosity is set at 60% constantly, 10seconds set for display shutdown.
Before instaling my OS 10.3.1. I did not wipe my whole phone, I did a backup of my 10.2.1 OS before, and when my 10.3.1 is instaled it also keept my provious settings and contacts, apps. of the 10.2.1
my 10.2.1 was verry good optimized no android app installed on it. and my battery drain was decent enought
My Rim Services usage is not a problem, I did what was neccesary not to get into the Rim beast battery killer.

*Need to mention that I removed the backround activites of almost whole my apps like 80% of them, and I have installed only one
Android APP wich is Instagram 6.15.0. this app have a huge battery usage when is used and I also used it with my plug in charger and Wi-Fi on.
* I will atach a photo of today's activity betwen the hours 08:00 AM to 11:50 AM, in this time I used instagram app at 08:00AM to 09:00 AM and "boom" 67% percent battery at 11:50 AM I have arround 18% battery.
What is going on?
please help !

Unfortunately, this is what happens to some phones when you do an OTA update. We are finding more and more complaints like yours about things gone wrong when your phone hads been optimized before.

Unfortunately also, the only way to fix this is to reload the OS your self from a file and that will wipe your phone. You will need to reload your backup.
Files are here:
http://forums.crackberry.com/bb10-le...oaders-995995/

Thank you for the answer,

Everything is ok now, what I just did I just did a backup off my device, first of all I instaled on my pc BlackBerry Blend with the Updates for BlackBerry Link etc.. and then I just reseted my phone wiped it to original then I just did my backup and after that I keept the plug-in 24 hours in my phone and now I have 1 day and 3 hours, and my 24 hours sistem usage is at 19% is all ok now.

And this screenshot is a screenshot took at 07:09 AM the battery usage now is 1% on standby/hour 08:19 AM (also with notifications check e-mails and instagram).. I recomand everyone to do a 60% Luminosity set and 10s shutdown display option also the option with saving energy when the phone is with the face to surface.
Enjoy your phone !
Have a nice day.