They can be recorded if another “crime” occurs at the same time.They are different, because they're not 'crimes'. They're driving offences. Upon conviction of those offences, they would not appear on a criminal record.
Had he been found guilty of the more serious issue of causing death then the other offences would have been recorded on his criminal record.
If he ever had reason to disclose convictions he would have needed to disclose everything - I know someone that by mistake didn’t and it caused him a lot of grief.