Frustration

I tend to be more intuitive than detail oriented. Knowing this, and wanting my gardens to be perfect, I did something I never have done before. I sat down and created a written plan for my beds. I think I should have gone with my gut instincts instead, because in the past when I have done this, everything turned out well. Before I put pencil to paper, I read a lot about each plant I acquired, paying special attention to height. I made sure to plant things that are expected to reach 24" in height behind those whose full height is 20". So, why when I look at my front beds, are tall things in front of short things blocking the view of the shorter plants? I can't figure it out. The only thing I can think of is that the plant catalogs lied.