My second domain that I do not use appear on page 1 on 14,000,000 results ...

Hey,I have a second domain "class101.org" that I most likely do not use but keep maintaining to pointing it to my website, I made a search on the "Computer Security Community" today without brackets " and surprisingly I see it today on page 1, rank #10 on 14,000,000 results !! How happen my old domain has a better rank ?? I did a search previously and class101.org was on page 6, 4 and now 1. How could it be possible ?

Computer Security Community - Google Search

redirecting class101.org directly to my main domain could enhance the main domain pagerank do you think ? Any SEO comment is welcome because I can't get a clue what's happening.

I will try redirecting class101.org to my main domain at godaddy and let you know if it changed something good or bad.

haha looks like it made the job, actually 15,400,000 results, my main domain this afternoon was upgraded on page 6, now page 3 and secondary domain is gone , go up tiny domain go up, hehe it points near top traffics sites like .gov or big security portals , vbseo rules