Issue with Merge Excel Documents plugin

Hi,

I am having a requirement to show 80 columns exported to excel.

I used export datastore entity to excel smart service in my process model.Since the smart service does not allow more then 50 columns,I generated 2 spreadsheets,(1st excel is having columns 1-50 columns and 2nd excel has data for columns 51-80).

I used Merge excel documents smart service but the resultant spreadsheet is not concatenating columns horizontally.

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Can someone please let me know if there is any alternate approach to  fulfill this requirement OR Any leads to fix the merge excel documents issue can be helpful.

Thanks In Advance!

Akhila