If the question asks have you been arrested for a misdomeanor or felony offense, you would have to list all arrests.
If the questions ask you to list a offenses for which you you were found guilty or pled guily you would have to list all offenses in which you appeared in court and entered a plea or was found guilty by a judge of jury, inclulding SIS dispositions.
If the question asks for offenses for which you were convicted, you would list those offenses in which a sentence and judgment was entred by the court. An SIS in Missouri is not a conviction if you complet the probation time.
This response is intended to be a general statement of law that should not be relied upon as legal advice and does not create an attorney/client relationship.
If you had a criminal attorney in Missouri, I would contact them about your SIS pleas and what legal effect that has on your status in Florida. If you did not have a Missouri attorney, I would check with a good criminal attorney in Florida and see how the law there treats SIS pleas as Missouri law does not always consider an SIS a "conviction."