With the 4 duplicate EF blogs this morning I think you have answered your own question Paul. 
It is a user blip, rather than an Olmec game one.

When you return to game page on your device then rather than click refresh, instead click "SESL" top left corner and that should return you to starting page.   

If could be on your device it re-loads last page you have visited, so you may have put your own device (phone/ipad etc) down while on trade page, and when you return it proposes trade again as your device re-loads that page you were last on. 
Same as if you are sat on blog page, and when you return it refreshs the last page you are on - hence your 4 EF blog duplicates this morning.

Frustrating for sure. 

As Steve notes, olmec web pages appear to behave differently for different devices so its finding what works best for your own device.

In meantime the triplicate trade can be reversed,
although Matt at SM may accepted trade in good faith as had thought you proposed the same trade 3 times (which your device appears to have done).