Create accounting execution report

Summary

Need clarification on the Transfer to General Ledger Summary section on create accounting execution report

Content

On the create accounting execution report, there is a section that says 'Transfer to General Ledger Summary'. I noticed that in some cases that some journal entries do not get transferred. Why would that occur if none of the events error? For example, I see 7 interorganization receipts and 7 trade accrual transactions, 2 entries where transferred to GL and 12 where not transferred. Attaching screen shot.