I took advantage of Amazon UK's offers on the series blu-rays the other day, and received my delivery yesterday. I noticed though that the packaging is somewhat inconsistent.
See the picture below: TOS S1 and S3 have a sleeve, and S2 doesn't. Similarly TNG S1 doesn't, while the other TNGs do. Is this standard, or have Amazon shipped me something slightly wrong?
I don't care enough to return them or anything, but just curious as much as anything... And would Amazon have any spare sleeves to send me, if I did query it?
See the picture below: TOS S1 and S3 have a sleeve, and S2 doesn't. Similarly TNG S1 doesn't, while the other TNGs do. Is this standard, or have Amazon shipped me something slightly wrong?

I don't care enough to return them or anything, but just curious as much as anything... And would Amazon have any spare sleeves to send me, if I did query it?