Got L1(Blanket) but retruned I129 is not stamped

[getpmk]

Hi,

I got my L1-Blanket stamped last week.
The Couns. officer was supposed to return me 2 I-129S back, which he did. [I came to know that these copies are asked at immigration counter while entering US]
Problem is my returned I129S copies do not have any stamp (such as "received"), there's only a sign of cons. officer and he's ticked approved block.
My friend also got the L1 but on his I129, there's a stamp.

Will this create a problem for me while entering in US?

Thanks,
Prasanna