please post your version numbers (TED Help panel). When I enter the same string as you I get an entire hour's worth of data. It doesn't stop at 10 records - more like 6000 records.
My gateway is 1.0.406. Footprints 1.0.223, MTU version 1.0.61
/history/secondhistory.xml?MTU=0&count=10&INDEX=1
Any idea why I can't control the data flow?