I have noticed this a few times and the questions or comments were not inappropriate. After submitting and seeing them posted, after a while they are nowhere to be found.
Most Helpful Guy
Well you've either encountered a glitch in the system
or someone deemed them unsuitable for viewing eyes.
If you have a questions as to why a specific post/comment were
removed, copy-past the message and contact GaG here:
http://www.girlsaskguys.com/contact explaining your story.
You can find more information, in the FaQ's posting guidelines:
Hopefully, it's not a glitch. ^.~0