firsttime & lasttime reversals in wigle DB

[bigstape]

Am I not understanding the "firsttime" and "lasttime" fields in the wigle database?

I assume that "firsttime" is the first time the AP is seen, and "lasttime" is the last time the AP was seen, yet when I look at some of the APs I've uploaded, lasttime is earlier than firsttime. Any idea what might be causing this? I'm using the wigle android client.

I don't _think_ I've been going through any time warps lately.