trend viewer, strange values

[PassivPluss]

Hi
I was wondering about the trend viewer.
I am measuring the heat tank element and when viewing the trend the following values are shown
,"6 Nov 2015"
"00:00",0
"01:00",0
"02:00",425
"03:00",0
"04:00",0
"05:00",0
"06:00",475
"07:00",0
"08:00",774
"09:00",0
"10:00",0
"11:00",462
"12:00",0
"13:00",524
"14:00",0
"15:00",0
"16:00",373
"17:00",203
"18:00",2005
"19:00",0
"20:00",513
"21:00",0
"22:00",0
"23:00",135

If I add all the values I get 5889 Wh, This means 5,8 kWh on this day

On the day by day trend I get 147 Wh this day, I would guess that 147*24 should be the same as the hour by hour trend?
,"Nov 2015"
"1",266
"2",330
"3",307
"4",209
"5",284
"6",147
"7",299


Is there an error here or am I missing something. This is an important reading to me and I have to know this accurate.