It is fake or it is real but not right repartioned somehow.
You can repartition with spflashtool if it is real. But if it is fake then it will brick your phone I think.
To see the ROM partion you have to use a terminal emulator and use this command:
cat /proc/dumchar_info
In my case I see :
Part_Name Size StartAddr Type MapTo
preloader 0x0000000000600000 0x0000000000000000 2 /dev/misc-sd
mbr 0x0000000000080000 0x0000000000000000 2...
Full wipe is only formatting filesystems, no repartioning.
Serial number is on a little plastic film. You need to scratch with your nails the grey area to see the serial number.
You have the TD version. You are not trying WCDMA roms ?
Differences I see: I have memory 2043.1 MB (I have WCDMA phone)
Assuming it is not fake then your memory is partioned different and that is causing the problem.
Did you use spflashtool ?
I think if you check your system storage under...
Post the system screen op CPU-Z here, I can compare with mine.
It must say also 320 dpi and mt6589.
I assume you downloaded cpu-z by your self from the play store (not included already on your phone). You can also check resolution when making screenshot en check resolution on your pc.
Run also...