Some vaccines ship as concentrates. One vial, for example, might contain six doses. Instructions call for a health professional to dilute the vial with saline. There have been 'accidents' in both directions. Nurses at a correctional facility failed to dilute the vaccine:
https://www.msn.com/en-us/news/crime/77-inmates-at-iowa-prison-incorrectly-given-up-to-six-times-the-normal-dose-of-pfizer-covid-vaccine/ar-BB1fUlTj
And another:
https://www.cbsnews.com/news/covid-vaccine-six-doses-distracted-nurse/
It's not surprising that you have a graphic of other mistakes with excessive dilution.