InStr command finding too many matches

Hi all,
I have this which I am trying to input a list of names of which the match could be in any of 4 columns....

This all works, BUT, if for example I put in 'sarah' and 'ddddsaarhcccc' is in the data dump then both 'sarah' and 'ddddsaarhcccc' are found.

But i only want to find 'sarah'


Can someone please help. I cant seem to work it out.

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I have included a dummy work book... i have put some dummy data into the physical and virtual worksheets.. and also included some search items in the 'servers to find' worksheet.

Upon clicking the button the 'servers to find' WS you will see that it finds 'sarah' and '9999sarahcccc'...