hello everyone tonight
Neil
you are not the first to make an error, no one is perfect, I am going to tell you one thing, thank goodness the tie beam wasn't too short or else you would be cutting a new one
My father once said "a good man can make a mistake, but it takes a better man to fix it"--so with that in mind I would suggest keeping all the braces the same run, and fill in the void with a good tight block of the same wood
I have seen many errors in historic frames created by the TFr's of that time, and a lot of them were brace hole position errors, they just put in a filler and moved on
In my field of reconstruction of historic frames having cross girts landing on irregular dimension rectangular upright posts, make no mistake to avoid an error in cross girt length was not for the faint at heart, especially if the girt was 30 feet long hand hewn from a specially cut tree trucked in from miles away
I did have this happen to me and it ended up only a 2" error in length but it might just as well have been 2 feet
So chalk it down to experience and motor on, I am sure you will be a better man for it--anyone who tries to pass judgment, do like my father did and turn and hand them the tools, you will not see any takers
good luck
NH