Hi Digital B2B'er,
Ideally Bounce Rate should reflect the exact number in Delivery Logs as well as Dashboard.
Are we sure that the comparison was done at the same time, maybe those 7 bounces were soft bounces which later converged into successful Delivery.
If the Dashboard and Logs are being checked simultaneously then this discrepancy could be investigated.
I checked on my test Instances and was unable to replicate this discrepancy.
Also, are you noticing this with all the Deliveries or only this one.
Regarding the Logs not loading fine, I checked on my Instance and indeed it takes time but eventually loads.
In fact at times you might have to play around with the Scroll button on the right a bit and then the 'More Logs' show up:
