Snip all because lots of "I am not sure" 
Here you go:Weekly update (2018-06-29_Fri_07.40h)
And this one:Weekly update (2018-07-06_Fri_09.38h)
What I would prefer to have (if you can do it, and readily to spend your time to do it) is:The last week of June is from 24th to 30th, and the first week of July started from 1st to 7th, right?
We should better have weekly reports on this standard time frame each month.
From your old weekly reports, data for the first week of July likely started from 30th June to 6th July. It's definitely wrong.