This has an upper tail probability of 0.08264739, meaning that once out of every 12 reruns of those eleven days you'd see multipool have this level of luck. Not very unlucky.
If submitted/expected reach 7.0 (one in a thousand) or 8.0 (one in three thousand), I'd start to worry.
OOC, thanks for illustrating exactly how unlucky multipool is - "Not very". I appreciate your effort here. Personally, I found this analysis reassuring.
flound1129, thanks for providing the data which made OOC's analysis possible.