Unable to flash TWRP

Yo

currently running newest official (12.1-YOG4PAS1N0).

I unlocked the bootloader-


then I put the recovery.img file at the adb path.
then I enter fastboot and typed <fastboot flash recovery recovery.img> and it flashed it.
I disconnected the USB, turned the device off and then immediately booted into recovery (Volume down + Power)... BUT- it takes me to CM stock recovery every time :(

was wondering if anyone knows what can be done.

CM Recovery update is disabledfrom Dev Options ofcourse.

thanks.