Thanks for the reply Jeff.
I did not only select the items on a particular page. I had created a unique code for 5409 citations. I then selected this code for the randomization process. I utlized the search function to varify that the original 5409 citations were found in the 10 groups.
(Group 1 OR Group 2 OR Group 3... OR Group 10) = 5409 original citations.
There is some randomization in the groups but there is obviously some order to the groups that are not accountable to chance.
Here are a list of some examples:
1. Group 5: Author names A-H
2. Group 6: Author names A- L
3. Group 7: Author names A-R
4. Group 8: Author names E-R
5. Group 9: Author names L-Z
6. Group 10: Author names N-Z
The likelihold that this many groups do not have the full spectrum of author names is extrememly unlikely given a sample of 5409 citations.
Not sure what else I can add here. It appears as the randomization failed in groups >5.
Cheers