Primary NOC code confusion CEC-STEM draw

[Lalikm]

I have 5 years of work experience outside Canada for NOC code 21231. In Canada I have 2.4 years of continuous work experience in NOC 21232. ( do not have continuous 1 year experience in the same company)
I got an ITA from a CEC-Stem draw. My primary NOC code I have selected was 21232, as I am currently working in that NOC in Canada.

1. I have read and got to know that your primary NOC code is only for FSW. Since I have more work experience in NOC 21231, Should I select that as my primary NOC?
   
   
2. As I do not have 1 year continuous work experience at the same company for 21232, keeping that as my primary NOC is going to be a problem?
3. Since this is only for FSW, can I keep 21232 as my primary NOC and proceed?

I highly appreciate if you can guide me on this.

Please note- Both NOC 21232 and 21231 were invited in the STEM draw.
Thank you