Your screen shots do not seem to correspond to the same business and customer. Or else, changes were made to the database between earlier ones and your latest.
Your list in Post #5 shows 2 sales invoices on 3/30/2018, 2 on 4/30/2018, one from way back on 2/28/2018,and 2 on 5/31/2018. But your latest screen shot shows no sales invoices on 3/30/2018, but three on 4/1/2018 (all from starting balance invoices that should be dated before your start date). Both 4/30/2018 invoices and both 5/31/2018 invoices are shown, but the 2/28/2018 invoice is missing.
So you seem to have edited several invoice dates between the times you captured some of these screen shots. This may have been done in connection with changing your start date. Can you explain what you did? You have obscured so much information, it is impossible to tell.
And what start date do you have set?