Hello,
Maybe I don't know better, but I am under the assumption that stamps should not be sold before the post office release date, is this correct?
Regards and happy collecting.

hola stampsellos,
if it is a usps issue, get some on cover and have them postmarked. you will be glad you did. they will be more valuable than a first day cover. just F.Y.I. from an old collector and delcampe member.

amities,
cajunsr.
member #301, collector for over 45 years, APS member.