[The italki system won't allow a longer response than this, even though it is 2677 chars but they say it is over 5000!] [I have to split up the story and correct half and half. I think it is counting the color and italics and bold as characters.]

I have tried to save it in .doc, .rtf, and now .txt format.

Embarrassing experience while job hunting present participle as adjective

[part 1] You have written 2 very long sentences in this part. I think you should understand what a period is for and what a comma does. A period is a full stop, a red light. If I was reading the sentence, I would probably take a breath in that pause. A period marks the completion of a statement of a thought. A comma, however, is a pause, a yellow light. It is a little breather inside a sentence. Commas are followed by a single space. So, I would try to stick to short or medium length sentences with the occasional long one – provided you use proper punctuation.

Today I was quite embarrassed, as I was declined by a company which I had interviewed 2 times previously with their HR and General manager,
>Today I was quite embarrassed, as I/my job application was rejected by a company for which I had already been interviewed twice by their HR and General Manager.
Usage of decline is as in decline an invitation, decline an offer, but not decline an applicant.
 
they expressed their satisfaction with both of my working experience and capability,and had showed they desire to give me an offer afterwards,
>They had [earlier in the previous interviews] expressed their satisfaction with both my work experience and capabilities/abilities, and had showed/indicated that they desired/wanted to give/make me an offer [to offer me a position] afterwards.
 
today it is the 3rd interview between me and a senior employee in this department.
From my point of view, it was a strange interview.
>Today I had the third interview with a senior employee in this [which? HR? SAP?] department.
From my point of view, it was a strange interview.

At first,she asked the another junior employee(a new comer) to join in the interview,and introduced the job resposibility briefly,
>At first, she had asked another junior employee (a newcomer) to join in the interview. She [or the newcomer?] then briefly introduced/described/outlined/ran through the job responsibilities.
 
but it seemed she was not willing to be open to some of quesions,
>But [all along] it seemed she was not willing to be open to some of my questions.
 
and then,she asked me to give a detailed illustration to the work flow in my previous company both in document and SAP to the junior employee!
>Then she asked me to give a detailed illustration/description of the work flow in my previous company regarding both documents/documentation and SAP to the junior employee!

[this is part 2 of the correction]

I was in a shock and did not know why,but it sees seems like they just what want to know what's the procedures are in another company!

At last I got news that they had just put into use [installed] of a new system, which was would not allowed any mistake.

The key point is  they think is my characteristic,as I am of being open-minded might easily lead to mistakes taking place.

It seems so ridiculous.

After  the two previous interviews with their high level management, along with their acknowledgement of my characteristics, they declined me rejected me in the end at last with for such a riduiculous reason.

Do they just want to get more internal information from [about]  other companies? How can i protect myself in such an interview?