Transpose Key question

Hi... I'm VERY sorry if I sound dumb...but... Notion is my first scoring software.
I am manually entering in a jazz band score. I used the Big Band template. Everything sounds great when I entered piano, EBass, Trombone. But when I entered the notes on the Alto Sax, it sounds terrible.
I verified that the proper key signature is on the staff (matches the printed sheet music) I also ensured that Eb is set as the transpose in Score Setup. But it's still playing the wrong notes In fact, (and maybe I'm doing something wrong), if I go to score setup and change the transpose from Eb to C, it still plays the same (wrong) notes on the Sax.
Hopefully this is just a newbee mistake.
Can anyone help me and tell me what I'm doing wrong? I'm happy to attach the notion file if needed.
Thanks!
I am manually entering in a jazz band score. I used the Big Band template. Everything sounds great when I entered piano, EBass, Trombone. But when I entered the notes on the Alto Sax, it sounds terrible.
I verified that the proper key signature is on the staff (matches the printed sheet music) I also ensured that Eb is set as the transpose in Score Setup. But it's still playing the wrong notes In fact, (and maybe I'm doing something wrong), if I go to score setup and change the transpose from Eb to C, it still plays the same (wrong) notes on the Sax.
Hopefully this is just a newbee mistake.
Can anyone help me and tell me what I'm doing wrong? I'm happy to attach the notion file if needed.
Thanks!