Samsung Galaxy Grand Duos: Odin flashed the custom Recovery but device boots into stock Recovery
Before you flash the recovery, untick the Auto Reboot option in ODIN. Then flash the recovery. After flashing in done, reboot your device directly to recovery mode from download mode bu pressing Vol up + Power + Home button together. Now you will see the CWM recovery is booted in your device. Now you can reboot normally and your CWM will be installed.