#4055 Comments missing under certain viewing parameters

[jt]

When I'm logged in and viewing comments for the article below with my options set to:

Threshold: -1
Nested
Oldest First
100 comments per page

The first 4 pages of comments are identical ( starting with post #22559040 and ending with #22561066) Pages 5, 6, and 7 are different. So it appears that 300 comments aren't viewable. Screenshot is attached.

main link:
http://mobile.slashdot.org/article.pl?sid=08/02/26/1438236

links with query strings:
page 1:
http://mobile.slashdot.org/comments.pl?sid=467106&threshold=-1&commentsort=0&mode=nested&pid=0

page 4:
http://mobile.slashdot.org/comments.pl?sid=467106&threshold=-1&commentsort=0&mode=nested&startat=300&pid=0

page 5:
http://mobile.slashdot.org/comments.pl?sid=467106&threshold=-1&commentsort=0&mode=nested&startat=400&pid=0

[jt]

screenshot of pages 1 and 2 of problem thread