[Xymon] Why IGNORE HOST and EXHOST work differently with UNMATCHED?

[Märt Laak]

Hi Henrik and others who help to develop this invaluable piece of 
software, Xymon!

I've been used BB more than 15 years for now and now trying to migrate 
to Xymon because it seems more flexible and powerful to me. Now I'm in 
the middle of converting my existing (fairly complex) bbwarnrules to 
alerts.cfg

Everything works great except some strange to me cases with UNMATCHED.

For example, if you look at these two configurations - they seem similar 
to human eye:

1: using IGNORE
---
HOST=*
   IGNORE HOST=somehost
   MAIL admin at domain.com

HOST=*
   MAIL supervisor at domain.com UNMATCHED
---

2: using EX...
---
HOST=* EXHOST=somehost
   MAIL admin at domain.com

HOST=*
   MAIL supervisor at domain.com UNMATCHED
---

However, the first (IGNORE HOST) construction does NOT send alert to 
supervisor at admin.com in case of somehost alert, as expected.

Is it bug or is there some explanation for this behavior?

With kindest regards,
Märt