78mbps is the maximum a particular profile in our systems goes to, which should always match the IP profile, but having it at 78mbps won’t affect your speed as the highest a IP profile can go is 76mbps (96% of sync speed).
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I wouldn’t worry about the loss showing on the speedtest as the speed is OK. Try running a test on a different site to compare http://www.thinkbroadband.com/speedtest
This is my personal Community Forum account to help out around these parts while I'm at home. If I'm posting from the 1st March 2020, this means I'm off-duty with no access to internal systems.
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