OK, first I don't think you pictured the quilt you are talking about. I studied and studied the pics and did not see different size orange squares or sashing that didn't line up.
Second, even if I could spot these things it was your SECOND quilt. SECOND, as in you hand ONE whole other quilt under your belt. I think on a second quilt if your only problems are a crooked sashing and not perfectly aligned back you are doing pretty darn good!