LAS VEGAS (Reuters) - Nevada caucus officials and voters at multiple sites on Saturday reported voting rules confusion, calculation glitches and delays in reporting tallies - despite efforts to avoid the issues that plagued Iowa’s caucuses earlier this month.

Preference cards are seen at a Nevada Caucus voting site at Coronado high school in Henderson, Nevada, U.S. February 22, 2020. REUTERS/David Ryder

After problems with an app set off a days-long delay in reporting results from the Iowa caucuses on Feb. 3, the Nevada Democratic Party abandoned its plans to use an app developed by the same company and instead implemented a more manual approach.

Even so, problems emerged, prompting fresh calls for the party to scrap caucuses in favor of primaries.

Caucuses require voters to attend a meeting for several hours and vote in the open by raising their hand or gathering with fellow supporters. In primaries, voters show up to their polling place and check the box for the candidate of their choice.

Ahead of Nevada’s caucuses beginning on Saturday, Democratic National Committee Chairman Tom Perez said the party will have to take a major look at the caucus system after the presidential election in November.

Perez called the Iowa chaos a “lesson learned.” Asked if caucuses should be ended, he said: “We are going to have that conversation after we beat Donald Trump.”

Democrats are holding caucuses in Iowa, Nevada, North Dakota and Wyoming this year, far fewer than the 18 conducted in states and territories in the 2016 White House campaign.

A Nevada State Democratic Party spokeswoman said that the caucuses had overall run smoothly with results continuing to come in and showed it deserved its early state status.

She said that the party had worked to accommodate a high influx of results, expanding capacity for the party’s phone hotline and using two-source verification processes, such as having precinct chairs text photos of their caucus reporting sheet to state party staff. She also said they had built systems with multiple redundancies, such as keeping paper records.

Caucus-goer Carolina Higuera said at her precinct at D.L. ‘Dusty’ Dickens Elementary School in North Las Vegas, there was widespread misunderstanding about how votes could be realigned. She also said caucus officials realized an iPad Google Forms tool, used to calculate results on caucus day with those from early voting, was counting votes for viable candidates twice.

“It just established a really icky feeling that it wasn’t being run well,” she said. “Everyone was like, I thought I was in Vegas, not Iowa. We’ve seen this on the TV.”

It was the first time Nevada has allowed early voting for its caucuses.

At precinct 1340 at Liberty High School in Henderson, there was confusion over how to count the votes, leaving several supporters of U.S. Senator Elizabeth Warren essentially left out as they mistakenly expected to benefit from early voters’ second choices.

Larry Van, a retired pharmacist who was the volunteer caucus secretary for a precinct that went to former Vice President Joe Biden, told Reuters he finally got through to the state party’s phone hotline, the main way to report results, after getting multiple busy signals.

Roger Elizondo, a 23-year-old student in North Las Vegas who caucused for U.S. Senator Bernie Sanders, the state’s winner, said he wished he had saved himself time by voting early.

“Everybody agrees that a primary would be better over the caucus,” he said.