At least one non-citizen and perhaps many more were improperly registered to vote in California by the Department of Motor Vehicles, prompting the secretary of state to demand a new investigation of the embattled agency Monday. The DMV said about 1,500 people may have been incorrectly registered between April 23 and Sept. 25 due to a “processing error.” That includes legal residents who are not citizens, although the DMV says none of the people mistakenly registered are people living in the country illegally. Incorrect registrations will be canceled by the secretary of state, DMV spokeswoman Jessica Gonzalez said. She and California Department of Technology Director Amy Tong notified the secretary of state about the problem in a Monday letter. It’s the latest issue the department has reported with its new “motor voter” registration system. Last month, the department announced it may have botched about 23,000 voter registrations due to a separate error."