do you have set "retry count" ?
i guess that every file is missing one part (that means exactly 5%). That happend to me a while ago with giga myself.
Just the first part of each file is missing then. If you have set a retry count it will try to redownload those missing parts, so every file stays at 95%.
the Log should tell you that.
set retrycount to 0 and restart alt.binz and try to repair it with par2 files (maybe you have to do this yourself cus par2 might not work in alt.binz in that case). It is possible that there are not enough par2 files for you to repair