Do syllables usually divide between 2 middle vowels?
I would say no, because often two middle vowels will make a single sound, as in would, because, and sound.
How do you separate joint into syllables?
The word joint has one syllable. This means the whole word is the syllable and so there are no syllable breaks.
Where is the syllable break in the word page?
The word page has one syllable. This means the entire word is the syllable and so there are no syllable breaks.