Yes that is correct.
Keep in mind that CSS Form Builder can use three different types of validation:
2) WebAssist Server Side (PHP) validation
each validation is independent of the other and has it's own error messages.
Spry validation is triggered when a form element losses focus (the javacript onBlur() event)
WebAssist Client Side validation *can* take place when a form element losses focus, but is mostly used when the form is submitted.
WebAssist Server Side validation *cannot* take place when a form element losses focus, it can only take place when the form is submitted.