I just replied to your email as well, but for others who may have the same question:
βDid I Qualifyβ uses each swimmerβs personal best based on all times currently available in our database. For meets swum this week, the update timing depends on when your LSC publishes the results or uploads them to USA Swimmingβs SWIMS system. Some LSCs release results as early as Monday, in which case the new times will appear right away.