I use the portfolio feature to see the track time in a list against the "time estimated" which gives me the time remaining.
With a normal time tracked widget the sum of hours is correct, but with the portfolio dashboard is not!
I use the portfolio widget so the clients can see the amount of time remaining in their retainers and I billed them based on that, so it is super critical for my business (and a lot of my clients use it for their clients as well!)
I hope this can be fixed soon