Default I need some help :[

I'm trying to put a rom on a tm-sm217s
i flash twrp, boot right to recovery and flash the rom.

no dice. it boots right back to the stock sprint touchwiz rom. however, there are some odd app- that would be with the non-samsung rom now installed. they don't work- no root.

go to boot back to recovery, can't need to goto bootloader and reflash twrp.

any ideas wtf i'm doing wrong?