8th slot items not available

So you know you have 8th slot items available like smoke grenades, med kit 2 and m60. But theres a bug. If you get the item that opens 8th slot (like the one for 5th slot) you will have a problem then. Just found out that when 8th slot item expired that none of the retail items were available like theres no 8th slot. So with marbles I bought 8th slot again to use it but thats not the way it was meant to be, is it? Please fix this.