Thats what I originally tired… but I tried setting those values (not group max occurs) again and the result is the same. Here is the output… any other ideas?
<Transactions ForeignKeyField="CustomerEntityID">
<Transaction EntityTypeID="4">
<ID AttributeName="ID">15</ID><RepairNumber AttributeName="RepairNumber">101</RepairNumber><TransactionCategories ForeignKeyField="TransactionEntityID">
<TransactionCategory>
<CategoryID AttributeName="CategoryID">714</CategoryID><CategoryID AttributeName="CategoryID">715</CategoryID><CategoryID AttributeName="CategoryID">719</CategoryID><CategoryID AttributeName="CategoryID" /><CategoryID AttributeName="CategoryID">877</CategoryID><CategoryID AttributeName="CategoryID">178</CategoryID><CategoryID AttributeName="CategoryID">302</CategoryID><CategoryID AttributeName="CategoryID">5</CategoryID>
</TransactionCategory>
</TransactionCategories>
</Transaction>
</Transactions>