Once you see it you can't turn away from it please consider looking one more time because its pretty clear once located
In all seriousness, it appears like it may have been struck through some grease. That is an extremely common "error", and worth zero premium. I do not even remotely see what you claim to see.
That would explain the mark around the date could that cause the mint mark to vanish or become faint?
picteals can only be viewed under heavy medication and or drugs. See here http://www.coinforums.com/error-coins/2047-2010-cent-picteals-might-last-picture-before.html
there is an 'S' there that looks to connect to the five but there also appears to be light marks below the 'S' too.
There is nothing there! The coin may have toned in a way that caused the shape of an S below the five but there is no error.