@aprilfuchs29 Your two plot files are as the warning says, seriously overlapped. The second plot should start at Plot1_start_none + Plot_1_Number_of_Nonces. So the second plot should have started at 300000001 + 3416064. However the second message about the name/size mismatch means that plot was interuppted before it completed, and the plot file doesn't contain wheat the name describes.
I'd delete that first plot file, and re-plot it.