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Error in stock prices (USEquityPricing)

Hi.

I have been computing the daily returns for the US stock prices for 2018, and I have found some errors for some stocks, for example for the Equity PETZ:

Date Symbol close high low open
2018-07-12 00:00:00+00:00 Equity(51200 [PETZ]) 100.040 100.04 5.061 5.061

And we can see in nasdaq for that date, that the close/last price is 5.5 and the high price is 5.58. Why such big differences? Also, we can see small differences in low and open prices, what could be the reason?

Regards,