You don't need to fix it. You are likely linking on a cash basis which is generally the easiest way. Therefore, invoices don't go over, only payment. However the invoices will still show on the mark transactions as posted screen. There's no harm in marking them posted.

i mentioned them i am on the accrual basis and i want them to transfer

If the link is set on an accrual basis and the invoices are not transferring over then I would need to take a look to figure out the issue. Note that the link must be set on an accrual basis, it doesn't matter how QuickBooks is set up. When linking on an accrual basis there are two important things to note. (1) What goes over to QuickBooks is NOT a real invoice, it is a journal entry. (2) The payments will NOT be automatically matched to the invoices. You must match them. It is very important you do this. If you do not, and you run cash basis reports within QuickBooks the data may be wrong.

Are the invoices being run on your workstation? Or by someone else?  

If by someone else, do they have the ACCOUNTING menu on their workstation? If not it's been disabled and caused Timeslips to ignore the Cash/Accrual flag and automatically assume a cash-basis company effectively marking the invoice transactions so that they do not 'need transfer' status when they are created.

Go to Setup, Performance Settings and re-enable Accounting Link to correct for the future.

Are the invoices being run on your workstation? Or by someone else?  

If by someone else, do they have the ACCOUNTING menu on their workstation? If not it's been disabled and caused Timeslips to ignore the Cash/Accrual flag and automatically assume a cash-basis company effectively marking the invoice transactions so that they do not 'need transfer' status when they are created.

Go to Setup, Performance Settings and re-enable Accounting Link to correct for the future.