[Siegmund]

Depends what you are counting.

You have a 38:9 chance to complete your flush on the turn, and another 37:9 chance to complete it on the river (a privilege for which you'll usually be paying an extra big bet.) In other words, no, you aren't miscounting your outs.

However the combined effect of the last two cards is that a four-flush on the flop has 1.86:1 odds of making the flush before the showdown. This means, for instance, you can raise for value on the flop if you are getting 2 or more callers, instead of just calling all the way.