Yes,I used my phone to access this site from the very first day because I'm far from home due to my studies and usually I use my phone to get help with my studies.And it wasn't until yesterday this happened.

So will I have to post it as a new question,every time I want to ask a follow-up question?

However thanks for informing. I wasn't aware of this case.

Our webmaster has been making many changes in the Jiskha.com programming lately, and this apparently is one of them. He is making these changes to give the website a cleaner look with fewer sections and "heavy" ads on the page. His re-tooling began a few weeks ago with the use of "today" and "yesterday" instead of actual dates. The actual dates of posting kick in when "yesterday" becomes day-before-yesterday!

Personally I do prefer the actual dates over today/yesterday because if and when we save a page, today/yesterday becomes a relative date which is ambiguous. However, today/yesterday could be an addition to the complete date to avoid confusion.

Actual date is 29th of July 2017.

And now its all resolved! The submit button appears as before.

No, you don't have to post a new question every time you want to ask a follow-up question. In fact, you can simply continue the conversation thread by replying to my previous response. This way, we can maintain context and have a coherent conversation.

Feel free to ask your follow-up question, and I'll do my best to assist you!