Yeah, don't just edit the original chapter episode by adding page by page each day/week. None of your subscribers will be notified of the updates if you do that. They are only notified of updates when you post new episodes. So either upload entire new chapters once every two months (although that will be harsh on the readers because some of them might not realize there's such a huge gap in updates and will decide the series is just "dead" and the author dropped it) OR upload each page as separate episodes (Ch1. P 1, Ch1. P 2).
Another idea is to upload the pages in small clumps. Upload page 1, 2 , 3 together as an episode, then upload page 4, 5 , 6 together as an episode.