Incorrect. Correction to your post below:
If you've filled your EE profile as non-accompanying spouse, you get NOI from OINP, you can't fill the OINP application as accompanying case,
1. If your score is getting lower down than cut-off range of OINP draw
2. If you fill your OINP application as accompanying and get 600 points. Later, you try to change EE as accompanying, you'll be rejected based on misrepresentation
You can only make the spouse as accompanying if your score is not getting lower than the cut-off score of OINP. In this scenario, you can change in EE and OINP application both and it's good to go!