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@MetroLandman
OK - hands up - I thought as you were talking about stand-dev etc. that you wanted to go to 1600 and that was the times I gave you. I have shot at 800 and mistakenly developed for 1600 but still got usable negs. That given there is still something wrong here as MrSmyth & GAG2 to noted.
My first question would be how did you meter this: incident or reflective? Was it a single reading reading or several and then averaged? 800 asa is well within Tri-X's latitude of one stop over/under exposure without major adjustment of the developing process.
If you haven't got it have a look here at the Tri-X info:
Kodak B&W film
I would advise that you do a few rolls at box speed with Rodinal/R09 to get to know the characteristics of the film/developer and how it handles different lighting situations.
My times and asa chart: