It is indeed the offset. Subtracting 100 days from the date solved the problem, I just missed it on hourly because 4 days is less noticeable than 100. I've come across something else as well. Watching the market with BTCe EMAs 19/45 with an offset of 100 leads to a "Failed to load historical trades from bitcoincharts." Reducing the offset to 70 solves the problem, but causes inaccurate EMAs. It may be due to to the missing candles on bitcoincharts on the 26th of August.