No TWRP

Hi, Would like some help or information if possible. I have a rooted Note 3 (N9005) and had TWRP on it for about a year, then i tried downloading a new rom it says i need to have a newer TWRP. But when i try to download TWRP (any version) on Odin 3. It dowloads to the phone as i can see the blue line going along at the bottom, it then reboots to my rom and i can use the old rom alright but when i go into recovery it says in red writing Could not do normal boot-Odin mode. And i have to go back onto Odin and download TWRP again and my old rom is back again. 1: How do i delete TWRP altogether and start again ( if i can ). 2: If i cant delete TWRP how do i go about putting a new rom onboard. I have searched your forums and can not see any with same problem with a Note 3. I still have root access and have tried Rootify with no luck.