I believe they glitched my letter.  It should read that you show up to donate holding that little card that gives you your date and then you are told you must wait 10 more days, not that you are not told yadda yadda.  In my case there is a regimen I follow a day or two prior involving eating an entire box of Total (100% daily iron in one serving and maybe 14 servings in a box) washed down with one of the propel vitamin waters with serious vitamin C to facilitate digesting the iron.  Which is wasted because somebody thinks my body can't recover in 56 days from my sixth donation (as if it could count or something.)  Anyway.