Brian, your wife arrived on a spouse visa and the eligibility period for ILR is 28 days before her 24th month of stay in the UK. Marksroomspain said the same thing in post #18.

The 28 days before expiration date is for those who arrived in the UK on a fiancee visa, like myself. Our ILR eligibility date will be based on the FLR(M) visa's validity date and not from the time we arrived here.