Strange behavior in advanced portfolio report

[Sébastien Monnet]

Hi,

Every month, I like to compute the gain (or loss) of my stocks (to  
add a unrealized gain). As I have some funds for which the quote is  
one or two days late was I do is the following:
I use the portfolio report at the begining of next month, once I've  
make sure that I've got all the quotes for the last month (for  
instance today for the month of January), I use cron to get the  
quotes automatically everyday.

I'm confused because:
if I set the date of the report (advanced portfolio) to "end of  
previous month", the report takes into account quotes of today  
(02/02/2007), so I entered manualy "31/01/2007" and it took into  
account quotes of 01/02/2007...
So, to have what I want (i.e. the state of my portfolio at the end of  
the last day of the previous month) I have to set 30/01/2007 !! (the  
quotes taken into account are those of the 31/01/2007).

Am I doing something wrong (thinking of my configuration) or is this  
a bug (found lots of things in bugzila about advanced portfolio but  
nothing related to this)?

Thanks !
-seb