When a customer journey is running, the designer insights view is regularly showing contradictory data.  Example:

1. 4 emails were sent at 10.30am in the morning.

2. Log in at 15:00, the designer insights is telling me 8 have been dispatched (segment stats) from the segment, 12 delivered to the email (see screenshot). 

There's some leeway in timings on these things as we're aware that there's some processing happening but 4 and half hours later, showing contradictory/wrong data is not ideal, especially as it's inflow and the designer view appears to be an operational report of what's happening on your journey.

It seems quite slow in general when journeys are running.