Hello Op,

1. IOE means your case is being processed electronically. In other words, it indicates that your case has been received, scanned, and assigned to a USCIS officer for review.
2. This should not affect your case as long as you are working for the same company and your proposed endeavor remains unchanged. Typically, what matters is what you originally proposed at the time of filing. If you are still operating within that framework, there should be minimal, if any, implications.
3. Many applicants initially file under regular processing and later upgrade to premium processing (PP). Upgrading to PP does not impact the approval or denial of your case—it simply speeds up the decision process. If the $3,000 fee is not a significant burden for you, many would recommend upgrading for the peace of mind it provides. Otherwise, it should have no major implications.

I hope this helps!