Bug: inconsistent date parsing by to_datetime
Hi everybody,

lets take the following dates:
`dates = ['04/07/2013 21:40','22/06/2013 02:40']`

if I call `pd.to_datetime` on these two date strings, it produces incorrect results. For the first date '7' is interpreted as day-value while for the second date '22' is interpreted as the day-value.

Please get me right I have no problem with the wrong parsed date value in the first string, but with the missing propagation of the corrent interpretation scheme after reading the second string.

Thanks
