Print blank page between page 1 and 2 on macro printing

I have been working on a workbook to help my coworker making paperwork faster. In the workbook I made a print button with an "automaticaly built (recorded) macro" to print 8 spreadsheets at the same time. Everybodies printer is sets to print on 2 sides so we should have 4 sheets of 2 pages but I have page 1 on a sheets then page 2-7 on 2 sides sheets and page 8 by itself. Would you know how to fix this?
Code is in "module 11"

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09-ATM-Arriel.xlsm09-ATM-Arriel.xlsm
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You can also take a look at all codes to see how all my macros are weirdly coded... but it's workking correctly, or almost correctly