1. Did you enter the US with the first two I-20s or where you already in the US when they were issued? If the answer is NO, then they are irrelevant.
2a. You already know what you need for the J1 - you asked about the DS2019 a couple of weeks ago.
2b. Did you ever enter the US on the K1 visa? If yes:
"Evidence of Continuously Maintaining a Lawful Status Since Arrival in the United States
Anyone applying under the following immigrant categories must submit evidence to show they have continuously
maintained lawful immigration status while in the United States and are therefore not barred from adjustment by INA
section 245(c)(2): applicants applying under a family-based preference category or an employment-based preference
category; special immigrant religious workers, Afghan or Iraqi nationals, and international broadcasters; and selectees
under the Diversity Visa Lottery program.
Acceptable evidence may include, but is not limited to, copies of the following documents:
A. Form I-797 approval notices for all extensions and changes of nonimmigrant status;
B. Form I-94 Arrival-Departure Record, including printouts of paperless I-94 admissions;
C. Form I-20, Certificate of Eligibility for Nonimmigrant (F-1) Student Status - For Academic and Language
Students, or Form I-20, Certificate of Eligibility for Nonimmigrant (M-1) Student Status - For Vocational
Students, including all pages containing notations by authorized school officials;
D. Form DS-2019 (formerly IAP 66), Certificate of Eligibility for Exchange Visitor (J-1) Status, including all pages
containing notations by authorized exchange visitor program officials; or
E. Passport page with an admission or parole stamp (issued by a U.S. immigration officer)."
Form I-485 Instructions
p.s. you honestly need to stop panicking or over-analyzing every single post or information you come across. It is not rocket science. The information you need is right there staring you in the face!