The word Oversen is misspelled against Overseen, which is past perfect of "Oversee"
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Overseen has double "ee" is mispronounced as "e"
Remember double 'EE' in between the strings Overs & n which should not be misspelled with single 'E'
Wrong Spelling:  Overs-e-n 
Correct Spelling:  Overs-ee-n 
Explore spell check of Overseen to spell without errors.