Related to this M.Y. question:
The answers and comments seem to state that one cannot create a Torah that has two different writing styles.
During Simchat Torah, I noticed that the main Torah I read from in my shul has been pieced together by multiple sofrim (scribes). The beginning of the torah (staring from Breishit) uses the Vavei Ha'amudim standard (a style where the beginning of each column (with a few exceptions) begins with the letter vav). However, somewhere in the middle, the style is not Vavei Ha'amudim.
Is this mix halachically allowable when repairing or even creating a new Sefer Torah. (I assume that a Torah is allowed to be create by more than one sofer.)