user is not logger in, but who claims something else

[Piotr Gnyp]

Hi

the situation:

discordia# ps -auwx | grep diabeu
discordia#

discordia# w
18:37  up 8 days,  5:54, 9 users, load averages: 0,03 0,05 0,02
USER             TTY      FROM              LOGIN@  IDLE WHAT
toread           p0       chello0621790851 18:26       - pine -i
diabeu           po       213.134.140.150: 17:42      46 -
diabeu           pp       213.134.140.150: 15:15    3:13 -
diabeu           pt       213.134.140.150: 15:01    3:12 -
diabeu           pu       213.134.140.150: 15:25    3:11 -


discordia# watch -coW ttypp
Snoop device change due to write failure.
Enter device name [ttypp]:

How to fix this bug? Well it`s not messing, but it`s very irritating. 
Please advice.