@Matt *******
it's because in your home country, you cannot get 365-days multi entry Non-Imm-O family visa any more. Only the single entry 90 days Non-Imm-O visa type. Savannakhet is, together with Rangun (Myanmar) the LAST Thai consulate to issue multi-entry family visa. It isn't even mentioned on their website - you have to ask them when you visit them