perhaps you should call the Property Registration Authority (PRAI)to find out the procedure involved & query relating to the property. I am sure the sale can still go ahead even with mapping queries, although PRA will not issue folio /complete registration until it is settled. Just a warning though it took over 10 years for our property registration to be our into our names due to Mapping Queries, was a bit more complicated than your issue as folio was originally one & split into 3 & each sold individually but split was only done at time of sale, the mapping queries were not even related to our folio. it took a lot of effort on our behalf to push issue & get it sorted, our solicitors were useless. edit: it cost us nothing extra in solicitors fees as completing registration was billed as part of sale process but in end I did most of the legwork & pushing & the PRAI were very nice to deal with & you can deal with them yourself.