Cron – Robustly disabling specific cron.{hourly,daily,weekly} script

Notice this line in /etc/logrorate.conf:

include /etc/logrotate.d

Perhaps you have some stale or backup files lying around in that directory, which get included, and specify daily rotation?

As a workaround, and if you still can't figure it out, and if you only ever want to have your files rotated weekly, then you can change the frequency with which logrotate is executed through cron, thus changing the precision of log rotation from daily to weekly.

From the manual (man 5 crontab)

Note: The day of a command's execution can be specified by two fields — day of month, and day of week. If both fields are restricted (i.e., aren't *), the command will be run when either field matches the current time. For example, ``30 4 1,15 * 5'' would cause a command to be run at 4:30 am on the 1st and 15th of
each month, plus every Friday. One can, however, achieve the desired result by adding a test to the command (see the last example in EXAMPLE CRON FILE below).

I guess you should turn your 2-31 into *

OR

you can use @daily, @weekly and @monthly.

OR

you can link to your scripts in /etc/cron.daily, /etc/cron.weekly, /etc/cron.monthly.