framelen is different; is it possible?

Good day All,

Had any one came across this problem before?
My down producer had send a npkt(en packet) with framelen of size 73 bytes
to a convertor (mytype->en) However at the destination computer, my
convertor could only receive npkt with framelen of size not equal to 73
bytes, sometimes 60 or 92 or 245. Is this correct? I read in the data but I
am not able to retrieve the information I had sent.
The offset is read as 0 at the destination computer’s convertor module.
Shouldnt it return a value of 14?