When I submitted my I-751, they extended my green card for 48 months after its expiration date (February 2024).
 
	 
 
	When I submitted N400 (married to a US citizen), they extended the green card for 24 months after the expiration of the green card.
 
	 
 
	We're good either way, but I wondered which one they follow. If I travel abroad before Feb 2026, I can present either I-797 to the border patrol officer and if it's after Feb 2026, then I should only show the I-751's I-797.
 
	 
 
	Is my thinking correct here?