Thank you for the compliment, these types of islands are sometimes tough to align because MHWS is not clear in the imagery. Yes, I am using a MapRoulette challenge in order to find these islands, then using JOSM to align the islands with Bing and Mapbox. I did not edit the other island because I thought the purpose of MapRoulette is to fix one instance at a time of a widespread problem and it is likely that the other island is a different MapRoulette task.