There's no need to split the dosage up throughout the day with orals.

You can take multiple doses if you prefer but you won't notice any difference.

I always prefer taking orals while there's food digesting in my stomach, it seems to help avoid any stomach discomfort.

Seven weeks of winny at 50mg/d is fine but to be on the safe side I think you should stop at six weeks.

Would be a good idea to increase your NAC to at least 2400mg/d.