Incorrect Health Daily Running Total

Annoying problem that seems to occur (almost) every day: I've been running on Treadmill, and inputting as "Manual Activity" into Strava. Since Strava is linked via HealthKit, these entries are transferred into the iOS Health App. While the Entry indicates the distance, the Daily Totals seem to always be doing something different... Example: 10 Mile Run imported from Strava, but 9.8 Miles for the entire data (Strava + Walking with phone).... it's maddening- PART of the Strava entry is definitely been included... just not ALL of the distance. ANY HELP APPRECIATED.