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I conducted my DESeq analysis on 30 samples split between 2 genotypes, 5 time points and 3 replicates (30 samples total - 15 per genotype). I tried to make my PCA plot but I seem to be missing 2 points ( 1 from each genotype). when I ask R how many samples it sees in the dds object, it indicates 30 so I don't get why I am missing points? I've attached an image below.