USCIS Policy Memorandum 10/23/17. USCIS is no longer giving deference to a prior approval at the time of an extension.

As of 10/23/2017 USCIS is no longer giving deference to a prior approval at the time of an extension.

This applies to all non-immigrant visa petitions (H-1B, L-1, H-3, TN, etc.).