what does that mean?

單位裏有人設計報表模板，然後我編程序做，設計員不停的給我發email, 我回信說

Probably we can meet to discuss the detail about the template before you start working on them. Below are the answers for your questions.

一天以後，她回信給我老板，並把我的這句話highlighted,

 

See email below. I was under the impression that I was meeting up with y’all to discuss this. I’m still confused on if I should be formatting this in Word or not. Can we please set up a short meeting to discuss?

然後我老板回信

– my apologies. Yes, ****** (my name) can meet with you at your convenience. Just let me know when you prefer to meet and we can discuss


***********************************************

My questions.  what's exactly she want to express for" I was under the impression that I was meeting up with y’all to discuss this."
why my boss need say my apologies, and want wrong with my email?