Texture problem in constructor

Iam using the latest(1.051) version of constructor. Iam new to it and just exploring. So pardon me if this is an silly question. When i try to adjust my tile and position of texture, it gives me weird results. if i reduce xscale by .1 suddnly the texture gets too strechedthen if i rotate teh texture the texture will stretch and even if i press reset button the texture will stretch. Iam finding it really hard to postion my texture in teh correct place.Is there anything basic i am doing wrong here. Pls guide me.

And one more, Even if i get my textures approximately right after several iterations, when i load it in TGEA some faces are missing and if i go beyond a certain distance, default uvchart textures replaces my texture. The whole building will be mapped by UVchart textures. Pls guide me how to solve this.