Can I use a 60-day family visit extension while waiting for my marriage-based extension application?

A user is inquiring about the timeline and options for applying for a one-year extension based on marriage in Thailand after encountering delays with required documents. They are considering using a 60-day family visit extension for additional time. Responses confirm that applying for a new extension can occur until the current visa runs out, and that the 60-day family extension can be processed at the same office.