Considering it's two different values, at different time stamps (although very close together), I'd say you actually got hit twice.
The road to hell is paved with good intentions.
"I've always wanted to kick a duck up the arse" -Karl Pilkington, on the question what he'd do if it was the last day on earth.
The timestamp in combat metrix related to damage taken is probably affected by when our client received confirmation from the server, which in turn is affected by lag. As such it probably does not accurately show the timing of when the damage was received since that is determined by the server.
Grand Master crafter, all styles and all furnishing plans known pre U41.
Vamp and WW bites available for players.
Shoot me an in-game mail if you need anything, happy to help!