Invoice understanding

[lbda60]

Hello, 
I do not know why in an invoice there is so many lines with remaining time and unused time. What it is?
I have a team account with just me as editor and some other user who are just in read only. 
Someone car help me please? sorry for my english I am french 🙂

[Ringthebells86]

I have the same question about my account. Were you ever able to figure out what it means?