(deleted)
tvr4:
The display should look like this
AAA BBB CCC
4 5 6
Ok, so what does it look like if not that?
(deleted)
Why would you expect (10,50) to overwrite something at (10,30)? Do you know that 50 is not the same number as 30?
Also, you are misusing the setcursor() function. Look in the library. It's (col, row). Row 50 makes no sense. Row 30 also makes no sense. There are only 8 rows, numbered from 0 to 7.