Good answers already to your question. I'll add one thought that
occured to me:
[color=blue]
> ... Then I use One Step and do not rinse, just like the directions say.[/color]
....[color=blue]
> On bottling day, I clean my bottling bucket and flush all my bottles
> with one step. ...[/color]
....[color=blue]
> ... Tastes terrible.. Like plastic
> or a bitter medicin. A Harsh, soapy taste...[/color]
....[color=blue]
> Come the 2 week period, I have a terrible tasting drink that will make
> your gut hurt with just a few sips..[/color]

Does it really make your gut hurt or is that hyperbole? ... Once I "ate"
few grains of dishwashing detergent (that was on the side of a glass)
and it almost immediately gave me a stomach ache.

The one time I heard of a REAL soapy taste was when a friend of mine on
his first brew, switched his sanitizing powder and his cleaning powder.
He ended up doing no-rinse sanitizing with cleaning powder. I don't know
the brands.

I don't use one-step. If you are on "city" water, try rinsing the
one-step out of everything with tap water and going from there. City tap
water should be fine for rinsing in practically all locations (ie., no
infections from tap water).

So... I'd be extra double sure that the "one-step" you are using is
the real thing and I'd rinse it off (or try completely without it or
get some other sanitizer). Is the one-step in a commercial container
or is your LHBS repackaging it? The example I pulled up thru google
said 1 tablespoon per gallon - is that the strength you're using?

Derric