Importing Problem

[faaslave]

I have just imported 1200 records into my database from excel. The strange thing is. Some of the phone numbers are not adhering to the calculation for the field. If I erase the number and typr it back in, it seems to work fine. I am using

Let( P = Filter( Home Phone; "1234567890" ); "(" & Left( P; 3 ) & ") " & Middle( P; 4; 3 ) & "-" & Middle( P; 7; 4 ) )

And I don't have the box checked "Do not evaluate if field is empty" So it's not that

Is there some glitch when importing numbers due to some problem with the font it imported?

Has anyone else had this happen?

Thanks Dave