use select SELECT * FROM cdc.fn_cdc_get_net_changes_dbo_source_table(@from_lsn, @to_lsn, 'all').

instead of SELECT * FROM cdc.fn_cdc_get_all_changes_dbo_source_table(@from_lsn, @to_lsn, 'all').

I have the same issue to do. i need to make use of CDC for the incremental loads. if you have implemented it, please share with me.

thanks