So I'm playing on an i-pad, v2.4.1 (H439).  I'm at 100% completion of all 1992 events.  I own every car and have them all fully upgraded.   One thing I can't understand is under my stats slide it shows that I have 1,858 gold medals, 1 silver and 1 bronze.  Total =1,860 medals, NOT 1,992.  It shows I've raced 4,340 times and the stats there are 2,264 gold, etc.  

This bugged me as I know I have a gold trophy in every event.  I went back through each tier of the challenge and sure enough, everything is at 100% gold.  So how do I track down these elusive silver/bronzes to eradicate them?  Additionally, how could I complete all 1,992 events, yet only have medals for 1,860?  Here are screen shots of each of my stats page so you can see what I mean.. 

I realize this is a fairly pedestrian concern, but while waiting for upgrades, the mind does wander...   Thanks for any help on this.