Updated Friday,May 25, at 1:05 p.m.: Revised to include comment from Paul Hamilton, Dallas County deputy chief tax assessor.

AUSTIN — Democratic gubernatorial candidate Lupe Valdez owes more than $12,000 in overdue property taxes on six properties in Dallas County and one in Ellis County, the Houston Chronicle reported Thursday.

The former Dallas County sheriff, who owns a home in north Oak Cliff and eight other properties in Dallas County, also failed to disclose one of them on her official financial disclosure report, and two companies listed on the report have incorrect names, the Chronicle reported.

Valdez campaign spokesman Juan Bautista Dominguez blamed her opponent, Gov. Greg Abbott , and the property tax system for the errors.

"As we've been saying all along, under Greg Abbott's failed leadership, property taxes are unpredictable and burdensome for Texans everywhere, including Sheriff Lupe Valdez," Dominguez said. "Sheriff Valdez has an agreement with the counties to pay off 2017 property taxes and plans to do so entirely in the coming months."

According to Paul Hamilton, chief deputy tax assessor with Dallas County Tax Office, partial payments toward property taxes are not uncommon. He added that paying some of your property taxes right away is better than paying none at all, as interest is based on the outstanding balance.

"It happens quite a bit," Hamilton said. "I can't give you a number, but it's not unusual at all. We encourage all homeowners to pay their taxes on time, but if a person is not able to pay on time we take whatever they can pay as a partial payment."

Dominguez said one of Valdez's properties in Dallas had two addresses attached to it when she bought it. The Bakersfield and Chalmers Street addresses are the same property, and the Chalmers Street address is listed on her personal financial statement.

"She makes all pertinent tax payments for this property at the same time," Dominguez said. "We plan to file an amended PFS [personal financial statement] to reflect this detail."

Dominguez added that the companies with erroneous names will be fixed in the amended personal financial statement.

Valdez, 70, has been making monthly payments ranging from $100 to $500 toward the bills, which could include penalties and interest after they were due in January, the Chronicle reported.

Dominguez told The Dallas Morning News that Valdez had similar overdue property tax issues in previous years, which were resolved the same way she's paying them back now. He said she plans to pay what she owes in full by July, when they would officially be considered delinquent.

When asked about her property taxes at a rally Thursday to honor Democrats who ran for office during the primaries, Valdez declined to comment.

She won the Democratic nomination in a runoff Tuesday, beating Houston businessman Andrew White by 6.6 percentage points. She became the first Hispanic female and first openly gay person to win a major party's gubernatorial nomination in Texas.

On her campaign website, she said local communities have been picking up the slack for "skyrocketing and burdensome property taxes." She advocated for reducing taxes and closing loopholes.

Valdez said Tuesday she is undaunted about facing the better-known and more experienced Republican incumbent in November. As of Feb. 24, Abbott had more than $41 million for his campaign. Through six months as a candidate, Valdez couldn't raise half a million.

"I am constantly hearing this is going to be such an uphill battle," she told supporters in Dallas.

"Please, tell me when I didn't have an uphill battle," she said. Was it when she had to take a city bus from the barrio and travel across San Antonio to get to school, or when she held "two to three jobs to get to go to college?" she said. "I am getting darned good at uphill battles."