I dont know if its just me, but I have this bug, when ever I join a server, I spawn with no secondary, untill I manually pick one, but if i pick up a secondary (say socom) Ill continue to spawn with that. I have my secondary set to always be the law in the options menu. I have also found that if I hit tab 2 times when picking weapons (to hide and un hide the weapon menu) Ill spawn with the secondary. Also if I do not select a secondary till the next map, I will spawn with one. The secondary is also highlighted like its selected, but still dont spawn with it.
Its not a game killing but, but annoying at times. And I dont know if its known, so im bringing attention to it.