There exists a bug in the grid that's best demonstrated with an animated gif.
http://www.gfycat.com/HandyPertinentAltiplanochinchillamouse
You can reproduce this behavior in the SamplesBrowser by setting line 13 of GridPullDownToReload.m to generate only 2 rows.
(Any chance I can get a fixed SR before Wednesday?)
Thanks for your help, folks!
Hey Caylan,
Yup thats definitely a bug.
We can take a look at it, and try and get you a private SR.
-SteveZ