While matching to SoundCloud, be aware that the number of tracks we are displaying as "found" could be different than the number you will get in your SoundCloud playlist at the end of the process.
Why? Simply because SoundCloud is not allowing duplicate tracks in a playlist. So if you got duplicate songs in your source playlist, only one item of this track will be added to SoundCloud.
So even if all songs are matched, you could have less tracks than expected in the SoundCloud playlist.
Also, be aware that SoundCloud has a limit of 500 tracks per playlist. That means if your source playlist is larger than 500 tracks, Soundiiz will create X playlists of 500 tracks in SoundCloud.