You need to omit the following isotopes in the burn card too and apply the omitting to all isotopes. if they are not important for your calculation.
All will work.
"23049 23052 23053 24051 25052 25053 25054 25056 25057 26053 26055 27057 28057"
BURN TIME =2.348,2.348
MAT=1,3...