Duplicate workouts

I'm not sure exactly when this happened as I don't look at my training log here often (but will now that Garmin Express is working) but I have a whole bunch of duplicate entries in my training log, I noticed it this morning.

For the last few months, I have just been doing a mass import from Training peaks every few weeks and after getting some workouts from Garmin Express yesterday, I did another import from Training peaks to get every thing over.  I believe the date range that I did was Sept 12 to Sept 28th (give or take a day).  This morning when I looked at the log I saw a bunch of duplicate entries over the last week.  I thought maybe I had done the import twice by mistake so I went and deleted the extras.  Then after noticing it was going back farther than the 12th, I stopped deleting them (in case they went WAY back).  It appears that it starts on August 29th and only includes bike and run workouts (not swims).  What I find a bit odd is that the 29th is one month prior to yesterday when I hooked up Garmin Express.  Is it possible that it went back a month and imported all of those?  I know when TP first did their integration with Garmin Express, there was an option for going back a month.

It's very possible that I screwed this up myself and if so I will clean it up but I wanted to post this in case there is an issue.

Edit: I just looked at a few people's training logs that reported it working and they also have the duplicates going back about a month.