miscount
From Longman Dictionary of Contemporary Englishmiscountmis‧count /ˌmɪsˈkaʊnt/ verb [intransitive, transitive] COUNT/CALCULATEto count wrongly Sorry, I miscounted – we need ten copies, not nine. The votes were deliberately miscounted.→ See Verb tableExamples from the Corpusmiscount• I thought everyone was here, but I must have miscounted.• They claim some ballots were miscounted.• Census Bureau officials announced that they miscounted the nation's official population by 5 million people.From Longman Business Dictionarymiscountmis‧count /ˌmɪsˈkaʊnt/ verb [transitive] to count something wronglyallegations that the vote was deliberately miscounted→ See Verb table