Securities price bug?

[Tj Junior]

I enter a stock purchase and accidentally use today's date, say buy 1 share
@ $100/share.  After I've entered the transaction, if I look at the stock
price history, it shows a new entry of type user:price of $100 for today's
date, all good.

Now say I realize that it was actually a historical transaction, so I go
back and change the transaction date from today to 2 years ago.  If I look
at the price database history again, it still shows the price entry of $100
with today's date (not the newly changed date of 2 years ago).  I didn't
see any existing bug reports on it but wanted to check before I entered a
new bug (or if someone else wants to enter it, by all means).