I think that I know what is happening with my missing computer 'Four' and the ghost 'Hactar' that was retired a year back but keeps showing WU returns. It appears that your web software is carrying the 'Hactar' name internally and applying it to machine 'Four'. I can't think of any other explanation although I don't know how this might happen. I hope that this information will allow you to make whatever changes are needed:

<userid>315458</userid>
<teamid>307</teamid>
<hostid>8575508</hostid>

I have searched every machine in the house for the string 'Hactar' and can't find it anywhere.

Thanks