The RAS that covers this CRDP backpay says at the bottom in ALL caps:Congratulations!
I am interested in "I was NOT TAXED at 28% - I was taxed at 32.33%." Are you having state taxes collected by DFAS? I know you were residing in a state that does not have taxes on income, but possibly you had made arrangements for taxes to be collected for another state at one time.
This is from one of the DFAS pages: The Federal Supplemental Rate for withholding is 25 percent.
You will likely receive a healthy tax refund at the end of 2018.
HMMMMMMM....25% Lump Sum Fed Tax Rate for withholding (Mil Pay)
6.2% social security + 1.45% medicare =7.65% total
25% + 7.65% = 32.65%
Note: CRDP is retired pay, restored