so I looked over at my tree about well an hour or so ago now and ... discovered something that disturbed me greatly ... it seems part of the branch has literally split open ... the green on it has sorta bubbled off and moved away from the inside ... oddly the leaves above it are still green and looking okish but I am worried I think I made some mistakes recently when transplanting .... its been over a week now but first I am curious what could cause this ... and second is it safe to plant it into a smaller pot ? will that save it if the bigger pot is too much ?

I tryed to add the pictures to show what was wrong with the plant but they where too big ... if anyone knows though what could be wrong let me know I am realy worried the plant means a lot to me

What kind of tree is it?