Question about Bait Casting style reels.

Hi Y'all,

Just been and bought myself an upside down rod and baitcasting reel for a
spot if lure fishing for pike & perch.
Got home and loaded the spool with some 50lb braid (not fekin about).
The reel dosn't appear to lock off and you can always pull line from the
spool.
Now, I thought that aint right, so took it down to show the bloke in the
shop where I bought it from, he also agreed it wasn't right and took the
other three reels off display to send back.
He swapped the (no name) bait caster for a Daiwa Cygnus 100-3BiL reel.
I've got this home and it appears to do the same thing, but with slightly
more drag.
Now, should this happen ? Should I be able to lock the reel off 100% ?

Cheerz - Brownz
http://fishing.brownz.org/