On most linerlock knives this would mean there would be very little room for wear as eventually the liner would be all the way to the right,but once there,they really dont wear any more as there is no more friction between the lock and tang to cause wear,and in reality,as long as the liner had a good amount of tension on it, it would be just as strong and safe as a perfectly fitted liner that locked to the left of the blade tang.
However, in the case of a benchmade liner things are different.
If you look close at the blade tang where the liner contacts you will see that the tang where the liner touches ramps up a little on its right side, or basically benchmade does a double grind on their blade tangs so the liner can never go all the way right like it can on other brands.The worst that will ever happen with a benchmade linerlock is you will get a little front to back blade play when the knife is locked if the liner wears a lot.
Of more importance on a linerlock knife is liner tension, just make shure it has enough to keep the knife locked open.
Yes we all would prefer to have the liner lock slightly left on all new linerlock knives but unless it is a rather beefy liner like on a microtech or a framelock its going to move to the left rather quickly anyway.
Your knife is acting like it was made to, enjoy it!