If there was business use in the personal residence (both the old and the new), the business portion can qualify for a 1031 exchange (although because the business portion is often a small percentage, the fees are often not worth doing a 1031 exchange).

As for the original question, did you manually do the math to check if there is any that should be deferring?  Sometimes things like receiving 'boot' or the cost of the new home may reduce or eliminate the deferred amounts.