You hit the reputation cap. As explained in How does "Reputation" work?:
- A maximum of +200 reputation may be gained per day. Accepted answers are immune to this cap (source) as are bounties (source). (A new day starts 0:00 UTC == 7pm EST == 4pm PST == 1am CET == 5:30 am IST.)
You have 3 accepted answers, at +15 each, so you got 245 - 3(15) = 200
reputation from upvotes. Any upvotes after that won't give you more rep
Edit: This got a little long for the comments; this is (I believe) the reason a post higher in the list got rep while ones lower did not:
The top of the list is (I numbered the posts for ease of reference):
(1) +15 15 mins ago accept Complex Regex problem with hyperlink not matching “?”
(2) 33 mins ago upvote Complex Regex problem with hyperlink not matching “?”
(3) +15 6 hours ago accept Empty elements in C# byte array
(4) +20 6 hours ago upvote Class methods vs instance methods
(5) 6 hours ago upvote How to select a field with linq on datarow
(6) 6 hours ago upvote wildcard generics in HashSet constructor
(7) +110 7 hours ago upvote Empty elements in C# byte array
He got 11 upvotes on (7). Then he got 2 upvotes on (4), which got him to the rep cap. Then he got an upvote on (6), and an upvote on (5), which didn't get him any rep. Then he got another upvote on (4), which also wasn't worth any rep, but put it above (5) and (6) on the list, as the list appears to sort by most recent upvote. Then (3) got accepted, which did get him +15, because accepts are immune to the cap. (2) got upvoted, which got him nothing, and then accepted, which gives him the +15 at (1)
There's a text-based version of the reputation summary at /reputation
, which breaks down each vote into its own line and sorts them in the order they happened, so looking at that might be simpler for cases like this