Investment account shows wrong balance

I have a Roth IRA I'm tracking in Quicken 2005 Deluxe Release R 5 Up until about a month ago, it was dead-on. Every transaction balanced out nicely. I started a new job, and couldn't do direct deposit to it any more, so I have my online banking send a check every week, and my shares are bought. But now, each time I get my statement, things are off... Quicken shows my contribution, and then a number of shares bought with that contribution. That part balanes out. But when I look at the main screen of Quicken, the value show is $600.66 high. When I look in the transaction history, everything is spot-on. When I look at the Summary page, the Market Value is right. But the Total Market Value is off. I'm totally befuddled... I can see no reason for this. And the discrepancy seems to grow each week.