I see weird things happening in multiple shop histories.
These things contain some bot-bot trades where a lower level bot buys something from our but for a random price (not necessarily the price in our trades set by us), then it gets traded back.
Why is this happening?
Example: https://www.dropbox.com/s/tehyclvr89zaf5z/example.JPG
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Btw, even though the API seems to be fine, the bot tends to not send the offer time to time claiming the API is down; which is not true (trading seems to be ok, steamstat.us is ok, your site isn't stating in the blue window that some of the inventories are down)
/Edit: However, it seems to be working with the single offer method which makes completely clean that there isn't any problem with the API right now.