Sum column values based on another column

Hi

I have a logging tool that reports me these column in the table "IMPORT"

[date][time][table][rows loaded]

So for example

01/10/2018 - 16:30 - table x - 100

01/10/2018 - 16:30 - table y - 250

So when I want to have the amount of rows loaded on a certain date, it's fairly easy with a visual.

I have then this visual

table   |  Last Import

table x |   100

table y |   250

TOTAL  |  350

Works fine

However, sometimes the importin runs twice so I have things like

01/10/2018 - 16:30 - table x - 100

01/10/2018 - 16:40 - table x - 120

01/10/2018 - 16:30 - table y - 250

01/10/2018 - 16:40 - table y - 257

In cases like this I would like to have, in the report only the rows where the date is the max, given a certain date.

So I wrote this DAX:

Last Import = SUMx(filter('Import';max('Import'[time]));'Import'[rows])

My concept is: filter my table import on the max value of import[time] and sum the [rows].

Now this works EXCEPT for the total, so I have something like

table   |  Last Import

table x |   120

table y |   257

TOTAL  |  727

It's like the measure is not filtered on the total row

What am I doing wrong? Thanks