As the SiO 4 tetrahedra are somewhat distorted during the refinement steps, the bonds guessed from the resulting structure do not always correspond to those from which it was built. As a result, we found 11 frameworks whose T-atoms were not all 4-connected, and 75 other frameworks whose coordination sequences did not match that recorded in the database. Two structures were found to have the same underlying net: 8013876 and 8035701, the latter having different detected coordination sequences than indicated. Barring these 86 mismatched structures, 18 nets only have a 2D periodicity and 31 are unstable nets not handled by Crys-talNets.jl. All those "problematic" nets represent less than 0.04% of all nets in the database. For the rest, no two structures had the same underlying net.