Glad it's working correctly now.
It didn't really slip my mind... I just didn't think of that situation for some odd reason. You weren't the only one effected. But it also wasn't a totally widespread issue either. Many people tested in ways where they weren't effected by that bug.
What it was doing was using the TiP data (that's the data points I record during the test) from your download test to try to determine your upload size... I simply forgot to tell it to ignore that part of the code for the upload test. ...most of the upload tests weren't having an issue because it only happened if you were doing a combined test with a download result that had TiP data.
The issue occurred after my last update, only completed about 24 hours ago. The new way the download test size is determined with SmarTest works smarter. By adding TiP information to the calculation it can make a better determination of the most suitable size for the connection. Hopefully without using too little or too much bandwidth. I try to test your connection with the perfect amount to get the job done accurately. More data is more accurate, but at a point you're just wasting time and bandwidth.
Please let me know if you see anything else weird. TMN is a HUGE program and I'm one guy trying to remember all the interactions of all the variables in the program, I make mistakes. I strive for a smooth experience for my visitors, please point issues out to me. There is a very simple contact link on the bottom of all the pages. As you can see, I'm quick to respond and quick to take action.
IE 9/10 faster. I've heard that. Personally I've seen spotty performance with IE, but I've heard that it really performs well for some people. I've been using it in parallels on Mac. I wonder if it has to do with hardware acceleration... and maybe if I run it on a native windows install I can see that.
I'd love to see your findings. TestMy.net is a great test bed to performance test browsers, I bet the new multithread speed test addition would be a good browser benchmark too. It's very new so I haven't had a chance to do much browser comparison. Post a topic in general discussion with screenshots... better yet video screen captures. Show the performance difference and tell us your system specs. Since your browser is processing the test information browser performance effects the results here, intentionally. Use this more and more and you'll start to realize that it isn't just an Internet speed test.
Happy Testing!