LOL on Incremental description: You cannot restore the account to a time before your last backup.
Yet another awesome Cpanel "feature", they contradict the essence of an incremental backup, what is the point to take an incremental if you cannot restore everything to a previous date? Incrementals are great, you just need to use the right software.
Doesn't incremental in this context means to only copy the files that have changed since last time. It's purely to prevent having to copy everything every time, not to provide some kind of timemachine/snapshot thing.