The commission also expressed optimism that it would announce the presidential results before the seven-day period provided for by the law.
In an update by Mr Chebukati, the electoral agency said it had set out to finish vote counting, verification and announcement of the presidential results before end of one week after closure of voting.
The electoral agency has until Tuesday, August 16 to announce the winner of the presidential contest.
"Constitutionally, we have seven days to have announced the presidential election but we will endeavour to conclude this exercise as early as possible," said Chebukati.
"The voter turn out is based on verification of Kiems kits that were functional countrywide. Some areas had to rely on physical register and once we have the results from those polling stations we will announce the final voter turnout," added Chebukati.
The commission further announced that despite the seamless relay of results via the form 34As from the polling stations to the central tallying centre at Bomas of Kenya, there were a few cases of erroneous transmission that happened between Tuesday night and yesterday.
Chebukati explained that form 34A from Rukwaro Market Polling Station in Rongo Constituency, Migori County had erroneously transmitted the presidential results portal. The returning officer had uploaded form 35A instead of form 34A. "The commission will validate the original form and and replace. We will also keep the error form so that if there is ever a dispute, then we can provide it as evidence at the Supreme Court," said Chebukati.
Other incidences were the uploading of two incomplete forms 34B from Ainakboi Constituency in Uasin Gishu County and Saboti Constituency in Trans Nzoia County, to the public portal.
Chebukati said the commission had directed returning officers to replace the images of incomplete forms.
Meanwhile, voting Wednesday commenced in Eldas Constituency in Wajir County after the exercise was suspended on Tuesday after a gunfire incident while ferrying ballot materials.