Someone please help me

Around Durin's release I noticed that I didn't get this achievement but weird thing is I've alrdy unlocked all the teleport waypoints for the first three areas You can also check the pictures, I'm not sure if its a glitch cus I alrdy tried counting (myb I miscounted) but I got 49 so I have no idea where the extra one is Someone please help me🥹 Edit:I counted again but I got 48 which makes it confusing cus it isn't showing any other teleport waypoints in those areas💔