Q1) Why have some of the Jehovah’s Witnesses entertained wrong expectations about dates?
I am so shocked that they would willingly remind the members about 1975 when many sitting there went through it. It shows that WTS is being beat up over their past and members are leaving based on such topics. So, despite the fact that reminding people about it seems dangerous, they must feel they have no choice but to tell the people what to believe about it.
Q2) What is the difference between Armageddon and the great tribulation?
Discussing "great tribulation" allows the mind-control cult to have their own language and feel special. Everyone has heard of Armageddon, so that ain't so special. Feeling special allows members to feel that WTS knows what it is talking about. So "great tribulation" is just buzz words.
The remainder of the questions seem similar to Q2- they are just there as proof that WTS knows more than everyone else.
Just stay on the watch by going to all your meetings and you will be fine- that's all.