eclas,
OBiAPP soft phone Status on the dashboard is green only when the OBiAPP is running on the computer. Actually it is the only time that the Status indicator on the dashboard is accurately reporting as "online". My OBi always appears as "offline" for some reason. This has been the longest running bug that I have noticed since day one, that is overtly obvious.
The OBiTALK number is tied to your user ID and can be linked to a voice gateway (an OBi unit). I think that is a unique number that was given to you by the OBi server. Having it on the dashboard doesn't hinder you in any way.
Short of deleting and recreating your OBi devices I don't see how to remove it from the list myself. Don't sweat it.