Subreport repeats infinitely

I have a form with a continuous subreport on it which is based on a
query that returns 24 hours worth of log data. The query that the
report is based on is running correctly - from midnight to midnight at
even intervals. This data is even reported correctly in my report's
column structure. However, once the data is written into columns in
my report, it starts over at the beginning and re-generates all of the
columns causing my report (which should be ~130 pages of columns) to
be seemingly infinitely long. Any ideas what would cause this type of
behavior?

Some add'l info:

1. The subreport DOES have "Can Grow" set to ON. This is necessary
for the data to be continuous from page to page.
2. The subreport is located in the Detail section of my main report.
3. Opening the subreport independently generates as it should - all of
the data without repeating.

Please let me know if you need more info!!!