Is it possible to use the "Import Data by Spreadsheet Process" ADD template to upload a single asset

Hi, I have been testing the Import Data by Spreadsheet process in our Image 37 DEMO environment. I have found that I can create an asset with multiple funding (cost) rows if I put a user-assigned Asset ID in the Asset ID column of the ADD template. However, if I enter NEXT for more than one row, the system will assign a unique Asset ID for each row. I assume this is because there is no way to tie the rows together.

This is in contrast to the Excel to CI utility, which supports putting NEXT in the Asset ID column of multiple funding rows, to which the system will assign one Asset ID.