Opening CSV File in Excel using VBA

Is this an anomoly in Excel, If you open a CSV file in Excel (XP) using VB and there is a column of dates (dd/mm/yy) in the CSV file. when the file opens some of the dates change in the column change to (mm/dd/yy). Weird!
Is this a know anomoly?Is there a Cure?

(Workbooks.Open Filename:=fn) where fn = filename