The names of the plugins (just to name a few) are
bm-custom-login
semisecure-login.1.0.3
mailout
edit-comments
email-users.2.5
wp-opt-in.0.8
wp-sticky.1.10
wp-useronline.2.20
wpmailing
wp-footnotes.2.2
wordpress-password-register.2.0
subscribe-to-comments
as I said, these are just a few.
the ones with single files in the folder are added to the contents>plugins folder whereas the plugins with more than one file are put into the same folder BUT all files are kept in their folder together.
I used filezilla to upload
So what is the problem?