Ok. I'm no expert either Matt but I've made mirrors before & tested them with a ronchi grating. (a long time ago)
I also recently made another one to test my C9.25 after reading about your scope & the general state of affairs re Celestron lately.
I assume your scope was at ambient when these shots were taken. If not, you will get a false test result (as I found out from practical experience).
My first test was conducted with the scope way above ambient & the result was images similar to your pics, but no where near as severe as yours.
The following night I let the scope sit outside for 5 hrs to cool & this time my lines were perfectly straight.
If your scope was at ambient simply disregard most of the above. According to your pics (& the link) its either under or over correction, depending on what side of focus your shots were taken. As to the severity of it, I guess you'll find out.
See the link below to interpret what your seeing.
http://www.orionoptics.co.uk/testing.htm