Finding data point from graph

I actually feel crazy asking this question but I assume there simply must be something easy I am missing. I have a couple of graphs in the attached spreadsheet and on Oct-10 the graph point drop randomly by around 15% basically throwing the whole graph out. When I go and look at the data the graph is looking at their is no abnormalities to explain it... can someone please help me understand what is going on here because I cannot get it! Thanks
1.xlsx
recycleausAsked:
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FarWestConnect With a Mentor Commented:
you have a hidden duplicate row in summary sheet
check this image
summdoup.jpg
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recycleausAuthor Commented:
OMG, you are amazing, I wasted 2 hours on this.. thanks heaps!!
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FarWestCommented:
Thanks to you  and glad I could help
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