What is the difference between するはずだった andしたはずだった

Question

I have confusion with the past tense of verb combined with the past tense of はず したはずだった

From what I understand:

1. するはず - Supposed to do verb at some point in the future (don't know outcome yet)
2. したはず - Verb is supposed to happen at some point in the past (don't know whether the verb happened)
3. するはずだった - Verb was supposed to happen (but it didn't) - am I speaking in the present?
4. したはずだった - Verb was supposed to happen in the past? (but it didn't)

For example, what are the differences between 3 and 4 in this sentence?

1. 彼女は一時までに電話するはずだ - She is supposed to call by 1 o'clock

2. 彼女は一時までに電話したはずだ - I suppose she called by 1 o'clock

3. 彼女は一時までに電話するはずだった - She was supposed to call by 1 o'clock

4. 彼女は一時までに電話したはずだった - She was supposed to have called by 1 o'clock?

And in this sentence:

あれ、携帯電話がない！うちを出るとき、カバンに（X）けど、カバンに入れ忘れたかもしれないね。?

Which is correct (X) and why?

1. 入れるはずだった
2. 入れたはずだ
3. 入れたはずだった

Answer 1

The sentence 3 means "She was supposed to call by 1 o'clock, but she didn't.

The sentence 4 means "She was supposed to have called by 1 o'clock, but we don't know she actually called by 1 o'clock. She may misunderstand it".

As for your second question, カバンに入れたはずだけど is best.