This summary is not the rule. The rule text controls.
If you were found not guilty because the charges didn't quite match the evidence presented at trial, that doesn't count as a real acquittal. The same goes if your case was dismissed because there was a problem with how the charging paperwork was written, or if it was dismissed so prosecutors could charge you with a more serious crime instead.
This matters because of a legal protection called double jeopardy, which normally stops the government from putting you on trial twice for the same crime. But this rule creates an exception. If your case ended for one of these technical reasons rather than a jury or judge actually deciding you were innocent, prosecutors can still bring charges against you again for the same offense.
In short, only a real judgment of acquittal, meaning a judge or jury actually decided you were not guilty, gives you full protection from being tried again. Technical dismissals or mismatches in paperwork don't give you that same protection.