I just checked my 2 sets of tips - at least on mine, the black bars on the loops note the line weight not the line "type". So one wide bar and 3 small bars mean the tip is for an 8 weight line. Likewise my set of nine weights are marked with one large bar and 4 small bars. The tips are tagged when new but the loop color indicfates the line type. Green = type 8, grey or white = type 6, yellow = type 3. The intermediate is clear ands the floating tip is the same color as the main line. Another way to tell is the relative thickness. The thinner the line the higher the type # - the faster it sinks - becuase the coating used is denser.
Types refers to sinking lines - the higher the type # the faster it sinks
I use the clear tip for more than half my salmon fishing. Coho, pinks chums etc are often most available in "frog" water even in fast streams like the vedder - tail outs, backwaters, slow pools. If it's a bit deeper or a bright day the type 3 is useful. For chum, sockeye and springs holding in deeper fast runs use the type 6 or 8 - but these are mostly for winter steelhead or still water. The floating tip is best for dry line applications like grease line or dry fly for steelhead.
You should call the shop you bought these from and get this cleared up or check the rio website.