.....Can you please explain a little what you mean by logging. Come to think of it sometimes when connecting my last track to the laptop it appears as "active log" but I have never found out what that means.....
"Active log" is the the current bread crumb trail. You can tell your GPS to start or stop leave bread crumb trail, which is not the same as turning your GPS on or off.
For example, you can be on a hike, leave bread crumbs, and stop for lunch. Before lunch, you turn your GPS off so it wouldn't waste the battery. After lunch, you turn your GPS back on and it will continue to leave bread crumbs. The before and after lunch bread crumbs are considered as a single "active log"
The following weekend, you go to another start park and go hiking, you can now set your GPS so this new hike will be the "active log", and the prior hikes be saved in your list of logs. If you forget to do this, then the new weekend hike will be attached to the end of the prior hike, and will all be treated as a single "active log".
In your case, when you turn the GPS off at the end of the hike, you didn't tell it to stop leaving bread crumbs. When you got home and attach your GPS to the PC, and turned the GPS on, your home is now attached to the end of the prior hike. You can always use the PC software to delete a leg of the bread crumb, like from the trail head to home. Easy to do.