Filezilla Upload Problem

whenever i set filezilla to upload more than two files together it repeats the file transfers

eg ti have two files upload 1 and upload 2

now if i set filezilla to upload both together the first conneciton will upload upload 1 and the second will upload upload 2

now the problem is once both transfers are complete the first connection starts uploadin upload 2 when it already has been uploaded the same goes for the second connection why is this?

same problem occurs when i upload videos to metacafe via their site

if i upload two files simultaneously

the solution is to upload one by one....

yeah but if u have alot of small files to upload then it takes time if u upload one by one