R1q2 sets deathmatch mode to 1 by default. Before you start a singleplayer game, in the console type: deathmatch 0
Looks like you somehow downloaded override files from the server that r1q2 loads when it finds them. Those files should not have to be in a client's game folder as they work serverside.Take a look in your baseq2/maps folder and look for files with an override extension, eg. base2.bsp.override (or just base2 if you dont have file extensions enabled.) and remove them from your maps folder.