Im working threw the Apache modelling tutorial and i am having a bizare problem with the smooth proxy command. When i run it it works fine and produces a smooth proxy version of my proxy mesh (the settings mean it produces both sides at once and aligns them correctly). If i pull a few verticies about the adjustments are made to the smooth proxy meshes however after i make a few changes such as cutting etc gaps start to appear in one of the proxy meshes (the other one always represents the proxy mesh perfectly).

Any sudgestions
TY in advance

Mark