You may be misremembering the initial releases from last November. The goal of the first round of studies was to establish whether the vaccines were effective

You may be misremembering the initial releases from last November. The goal of the first round of studies was to establish whether the vaccines were effective in protecting people who received the vaccine. The studies were not designed to determine whether it still spread, and so the statements were very precisely worded as "has not been verified to prevent transmission", or things to that effect. Unfortunately, the English language doesn't make any distinction between "has not been observed" because it hadn't been studied yet, and "has not been observed" because it doesn't exist. Later studies have determined that vaccination greatly decreased the transmission, but by then the idea that they only protect the individual had taken root.