Unexpected Upload speed in 0.72

I’m using bitcomet 0.72 with winxp sp2 5.1build 2600. I already set “global max upload rate” in preference there to become 15kb/s. my Maximum download is 512kbps and upload is 256kbps. So I think is 64kb/s maximum download…

Following is the result which is in progress of downloading…

Overall uploads speed : 13-15kb/s

upload speed per task: 20-30kb/s (suddenly upload speed jump higher than upload speed that I set in preference.)

What problem is this… is this BUG???

0.72 has a few bugs, just go back to 0.70 for now.