The first person who stepped in was cured. This passage seems strange. The process would not be at all fair, because the blind could not see the waters being stirred, and the less mobile of the disabled would have no chance of a cure. Part of Verse 3 and all of Verse 4 are missing from the oldest manuscripts of John. It appears to be a piece of free-floating magical text that someone added to John.
Most scholars believe the latter.
This is a curious passage. It appears to prohibit all talking by women during services. This is a very important passage, because much many denominations sexist stand against female ordination is based on these verses.