Guitarhacker:

When you bring the song into BIAB's ACW, and set "bar one", it will continue adding bar lines where IT thinks they should be.

That obviously isn't working for you.
Just continue to set additional bar lines, even if you have to set every single one of them.

The ACW is capable of setting the tempo to THREE decimal places so you shouldn't have any trouble getting it to line up to 63.5.

Let us know if you need more help.

Good luck!
LLOYD