OK I did retest.  I used my One Touch Ultra for the 308 reading.  The One
Touch profile tested 283 so they are close enough to verify each other.  I
did wash my hands too, I have noticed the Ultra is very touchy about clean
hands.

I did have milk with the Shredded Wheat.  the SW is 36 grams per 3/4 cup.  I
had it with skim milk though I did not finish off all the milk.

I can test anytime.  I tested in this case 4 hours later because I had
forgotten to test earlier.  I just decided to see what it was no expecting
anything close to 308.  I was shocked.

As for DP this is where I get confused.  I am always higher 2 hours after
waking.  Always.  Should I not worry about a spike if it has the effect of
turning off DP?  I was eating Quaker Oats Breakfast Bars.  They have a
low-sugar version that I can't find anymore.  They have about 10 grams of
carbs I think.  Maybe 15.

So this may have been some erratic liver dump?

Paul

My OT Profile confirmed the Ultra's reading.  I was really spiking there.
Could I have eaten at just the time the liver was cranking out the glucose?
I can see that.  But such a huge drop, I mean more than 100 points in less
than an hour?  That is so bizarre.

Paul

I always take a more careful second reading when I get an unexpectedly
high reading. So far the high readings have all been due to my own
carelessness in getting something sweet on my finger from handling a
bit of cake, candy, fruit, etc.. The slightest trace is all that's
required to seriously screw a reading. Developing more careful testing
procedures has reduced the incidence of anomalously high readings a
lot.

In my experience the problem isn't my meter, it's my carelessness.