Positive PCR, asymptomatic, followed by negative pcr

[BlondieD]

Has anyone here experienced this either themselves or with a family member or within work?

There was a case in the Irish media over the weekend of a politician testing positive. He was asymptomatic. He tested because it was a requirement for the Glasgow climate change event. He tested again because he was contacted by health officals and he tested negative on the second time.

I find it very weird because I thought a false negatives can happen but false positives not as much.

Well.
His first PCR may have picked up the tail end of an asymptomatic/very mild infection. By the time he did the 2nd PCR the infection may have passed.

False negatives are more common than false positives in both PCRs and LFTs, but they do still happen. Whether those false positives are due to cross contamination, faulty tests, mix ups at labs, poor testing practises... etc.

Most likely he had it but was better by the second test or the second test was a false negative. False positives are very rare and false negatives are very common.