Default Safari Download Is Faster, First Segment Is Always Slow

I have been testing this app out since it’s release. It could be great if improved.
A few things I have noticed…

When downloading a file, the last four segments will be fast,
But, Some segments will always be very slow, and waiting for these segment(s) to complete takes forever.
This happens on almost all downloads.
Waiting on this first segment takes way longer than to just download the file the normal way through Safari.

The other thing I notice that with password protected downloads, it will just download an html file and not the corect file.
This is after I enter my credentials. It will not work for most protected downloads.

I have a fast connection around 100 Mbps, so that should be fast enough for the first segent to download at top speed, but it’s sluggish every time.
Please fix these issues, especially the first, it negates the whole point of an app like this. I hope this gets corrected. Thanks very much

itabmedia about Download Shuttle: Speed Boost