Missing events on server's history page?

Running xymon 4.3.17 , on linux, wondering if anyone's seen anything like
this?
for example our "edapps2-cf2" just alerted on cpu.

The non-green view shows these most recent event

Wed Apr 22 09:33:25 2015    edapps2-cf2.example.com    cpu
(yellow->green)
Wed Apr 22 09:28:24 2015    edapps2-cf2.example.com    cpu    (red->yellow)
Wed Apr 22 09:18:22 2015    edapps2-cf2.example.com    cpu
 (yellow->red)
Wed Apr 22 09:08:19 2015    edapps2-cf2.example.com    cpu
 (green->yellow)


When we go to the host page then cpu dot,and look at the full history we
don't see  them

All log entries
Date    Status    Duration
Mon Apr 13 17:00:44 2015    8 days 16:40:47      (green)
Mon Apr 13 16:45:41 2015    0:15:03                    (yellow)
Tue Mar 24 19:11:14 2015    19 days 21:34:27    (green)

When we look at Reports/Event log they show up

Wed Apr 22 09:43:45 2015     edapps2-cf2.example.com     http     green
From -> To     yellow
Wed Apr 22 09:33:25 2015     edapps2-cf2.example.com     cpu     yellow
From -> To     green
Wed Apr 22 09:28:24 2015     edapps2-cf2.example.com     cpu     red From
-> To     yellow
Wed Apr 22 09:18:22 2015     edapps2-cf2.example.com     cpu     yellow
From -> To     red
Wed Apr 22 09:08:19 2015     edapps2-cf2.example.com     cpu     green From
-> To     yellow

why aren't they on the host/cpu history page?
thanks for any clues/explanation. We do see other events with shorter
duration on that history page