I hardly doubt that you are successfully rooted.
Your links refer to Android JB, and this methods don't work with Lollipop Api 22.
I have rooted my Remix 2.0 with the following method:
Using a Linux machine and mount "system.img" read/write.
Download
Supersu 2.52 and extract the zip file to disk.
Use the following caode as a template and copy all necessary files manually from Supersu 2.52 into the correct location.
Set the Symlinks correctly.
Unmount "system.img" and copy it back to your USB stick/whatever you boot from.
Done!
No need to chmod something, since this will be done while boot process.
Ecd /tmp
cd root
BIN=/tmp/root/x64
COM=/tmp/root/common
MKSH=/system/bin/mksh
# Placing files
mkdir /system/bin/.ext
cp $BIN/su /system/bin/.ext/.su
cp $BIN/su /system/xbin/daemonsu
cp $BIN/su /system/xbin/su
cp $BIN/su /system/xbin/sugote
cp $BIN/supolicy /system/xbin/supolicy
cp $BIN/busybox /system/xbin/busybox
cp $BIN/libsupol.so /system/lib/libsupol.so
cp $COM/install-recovery.sh /system/etc/install-recovery.sh
cp $COM/99SuperSUDaemon /system/etc/init.d/99SuperSUDaemon
echo 1 > /system/etc/.installed_su_daemon
ln -s /system/xbin/busybox /system/bin/busybox
if [ ! -f $MKSH ]; then
MKSH=/system/bin/sh
fi
cp $MKSH /system/xbin/sugote-mksh
if [ "$API" -ge "21" ]; then
mkdir /system/app/SuperSU
cp $COM/Superuser.apk /system/app/SuperSU/SuperSU.apk
rm /system/bin/app_process
mv /system/bin/app_process64 /system/bin/app_process64_original
cp /system/bin/app_process64_original /system/bin/app_process_init
rm /system/bin/install-recovery.sh
ln -s /system/etc/install-recovery.sh /system/bin/install-recovery.sh
ln -s /system/xbin/daemonsu /system/bin/app_process
ln -s /system/xbin/daemonsu /system/bin/app_process64
nter code here...