IP aliases not getting set at boot on 9.2.

On one of my FreeBSD 9.2 boxes I have the following lines in my rc.conf:

Code:
ifconfig_igb0_aliases="\
        inet x.y.z.142-159/23 \
        inet x.y.z.161-164/23 \
        inet x.y.z.166-169/23 \
        inet x.y.z.180-225/23 \
        inet x.y.z+1.40-65/23 \
        inet p.q.r.116/25 \
        inet p.q.r.97/25"

When the system boots, all the ranges get set properly as aliases on igb0, except for x.y.z.180-225/23. On that one, only the addresses 180-212 get set (the ranges that follow it get set correctly). Once the system is running, I can manually add the aliases for 213-225 with no trouble. I have not seen an errors in /var/log/messages and I cannot figure out what is wrong. Any suggestions, ideas, incantations, etc. I can try?

Thanks in advance for your help.
 
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