Panic - lost the whole guest list - is the site glitching this evening???

One of teh guests did not have an option to decline, only cancel, so I pressed cancel, it warned me I would lose table information for that guest, which is correct, but it then wiped the whole ceremony - guest list gone, the lot. After about 15 minutes it all came back - you can imagine the panic as I have over 100 accepted on there. It has not changed guests that have declined to cancelled for some reason - is work being done on the site this evening??