Export Data Source Entity to Excel - Questions

We are using 'Export Data Store Entity to Excel' smart service to write data into Excel files.
We built a process model which copies an excel template and writes into the copy of the excel template to generate an excel file using this smart service.
This smart service is pretty much doing a good job other than few issues which we are trying to find resolution.

Here are couple of questions if you can help with.

1) We notice that formats maintained in the Excel template is getting lost if we write some values into that specific cell. Is there a known way to avoid this?
(Please see the screen shot attached)

2) Also - we notice, in the cells, if we write numeric values, the generated excel is comming up with this 'comment' icon in cell corner. We tried to write the value as numeric to the cell. But looks like still that is not fixing the issue.
Is there a known way to avoid this?
(Please see the screen shot attached)

3) Is there a way to delete a sheet from the excel in the process model?

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