v1_0

One thing to think about: if your database transactions take a different amount of time each, then your progress is just 'number of transactions' as opposed to 'time'.

Is it possible that your first transaction is taking a very long time (perhaps things are getting cached, or you are doing a select), and all your other transactions are very quick? In that case, your status bar will sit for a while (as no transactions are completed) then 'jump' to done as your 2-n transactions get done quickly.