EPPlus Issue with date format in same rows in any report

Apr 26, 2013 at 11:21 PM

I've come across annoying issue which I cannot fix and hopefully somebody can help me out.
Whenever I generate report I have issue with date format BUT in specific rows only.

Please see that example

I've tried all kinds of date format on column like
ws.Column(3).Style.Numberformat.Format = DateTimeFormatInfo.CurrentInfo.ShortDatePattern;
ws.Column(3).Style.Numberformat.Format = "dd.mm.yy"
but nothing seems to work, whatever criteria i use to get data into report, everytime same cells ,same rows are getting date code instead of format.