Tai, I feel that you feel bad. Don't. You honestly did not offend anyone, if they were offended, then they should lighten up. I thought that it was interesting that such a pretty picture could be made from layers, that is what it is called eh? I have worked a teeny tiny bit in Adobe Photoshop and I know a teeny tiny bit about layering, hardly anything at all though.
I for one am glad that you pointed out how pictures can be altered, that was a point worthy of imparting to us. Some of us (meaning myself mostly), are not overly computer savvy, and honestly am pretty kniave when it comes to what can be done on a computer. I am on the furthest tip of that ice berg for sure.
Don't lament over this, like you said you did yesterday, it is merely nothing to be worried about. Carry on, all is well.
Have a wonderful and beautiful day, love our life we're livin'. Cindi