Selection woes and texture agitation

Hello i just want to say this is a really fine program you have here but im haveing some difficultys with selection of faces.

i dont know whats going on but every now and then constructer wont let me select the face of my brush it selects the other side or nothing at all sometimes in bush mode it selects every thing but what i want to select. fortunatly i dont have this problem in vertex mode.

also i dont know if i just havent found it yet or not but there doesnt seem to be a texture lock so when i move my brush the texture stays and its like moveing a camara over the repeating texture. any ideas as to how to fix this?

also with textures they dont like curved surfaces and they look really fake almost cartoonish. is there a way to fix this? where do i add bump mapping or normal mapping or paralex mapping or what have you? anyway thank you for your time.