The seller has no weapons (Killing Floor)

When you go to the next map (match just ended and the new began), there is a problem with the store. When you have to run for shopping at the end of the first wave seller does not have half of the weapons, even the runoff from the name there. Available only DLC weapons I have the official version and DLS is not purchased. The problem can be solved only by the replacement perk. Is there a way to get rid of the source of the problem?