You are correct. I had remembered that certain replies were made invisible, deleted by other moderators or administrators. We recently had a discussion questioning the wisdom of members stating their email publicly.
The present administrator (Bigdogguru) can give a more complete answer about the Jobs section. He'll get a message asking him to look at this thread.
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My first information was correct. This just came from Bigdogguru:
"Any replies should be done via PM directly to the OP of the Job Offer.
Direct replies to the thread are no longer permitted within these two sections.
If members are seeking a job and want to start a thread with an uploaded resume, a list of their qualifications and the type of job they seek, however I would suggest they refrain from posting personal contact info within the thread itself.
I'm working on a sticky explaining these policy changes for both the BA&P and EDA Jobs section."