@Steve ****
no they will not, and they'll fine you 500 baht a day for every day you run past that 90 day stamp from the Non-O. so for 6 days you're looking at 3000 baht in overstay fines.
Believe me you're far from the first person to have this happen. So it's something they have seen before
BUT
you need to GO to your immigration office with your bank book and passport and show them the dates so they can see you'll run on overstay and see how they will feel about it.
Not to belabor the point but this hole you're in now, you dug with your own shovel 😮
The immigration officer are under no obligation to 'work with you' (let you run on overstay until you can meet the seasoning) at all and can certainly tell you to get out and start the whole thing over 😕
I think they WILL let you do it but I sure wouldn't just think they will and show up ready to go forward with your year extension on overstay without them knowing ahead of time about it <- which is why I suggested you GO to the immigration office and see what can be done..