All, thanks for the comments it looks like my best option is to get the 90 visa, come into Thailand, then before I leave get the re-entry permit, come back to Thailand and then apply for the 1 year marriage extension, then after that get a multiple re-entry permit.
Appreciate all the assistance offered by this group.
From what others have said my best option is to come in on a 90 visa, get the single re-entry permit and then the next time I am in Thailand do the 1 year marriage visa extension.
I could do that I would have to ask the company I work for to get me an onward ticket, which the cancel after entering Thailand. As most airlines will ask for this if I dont have a Visa.
My current visa expired at the end of May, I got back into Thailand 5 days before it expired. I left Thailand 4 days ago and was starting the application and saw that the Multiple entry option has gone from the Non-O marriage visa.
Wish I had checked before leaving as I could have possibly sorted it out early.