Is convenience a adequate excuse for continuing to place yourself in harms way?
If she would like to continue patronizing the store, she should hold off until this stumbling block is addressed or removed.
The OP never specified about the “personal questions”. There is a clear difference between asking, “How are your kids?” and specifics about her kids.
There are people that would feel uncomfortable with any interaction. That is why I think it would be wise to have woman working as representatives for the store.
“The Original Poster did his due diligence to observe what his wife described and he, “saw this person shmoozing with obviously married women, just walking around and out of the blue talking with customers who are not dressed tzinus, and so on”
Is the OP implying that his wife is one of the untznius woman? That can be addressed in the other thread.
The manager behavior may have very well been inappropriate, but your LOR should be contacted not some blog.