Hi, I've not got the best internet so have to limit how many files are downloading at any given time, i've tried setting both the upload and download to 1 slot for both, but when i first start the downloads off i get two files downloading AND uploading at the same time, once one file has finished downloading it then starts working as expected 1 file downloading and one file uploading. is this a bug or how this works?

Thanks in advance.

Lowering download slots doesn't stop downloads that are already running. Remember to turn off "Recycle unused download/upload slots".