my improvement was just strange, just strange

The first time I took the SAT my scores were just bad (except for math).
Cr - 660
The second time I took the SAT i studied my ass off for CR, because I was getting like 700-740 in the blue book practice test and I really wanted to do well in CR
result => CR - 660 (NO CHANGE!)
Man, it was like the CR section just had something against me........and when I took it the second time CR was just hard.....
But my over all total was ok (2120) so I sent my scores to the colleges.
Then I saw the January SAT coming up and I wanted to give it another shot (really wanted an 800 in MATH). So I registered.
Started studying like 2 days before the exam because I had no tension. I mean, if it was bad I wouldn't be sending my scores right?
haha
Third time was funny.
Cr - 750 (no practice, just a bit of word list on the day before the exam)
and my MATH dropped lol.
[ok ok I admit before my second SAT i solved most of the blue book papers,did Barron's SAT 2400(which is really good for the writing section; and so is SparkNotes) and SparkNotes (including the 1000 word list, which is just awesome, I would recommend it to everybody. Almost all the words come from that list) and I studied my ass off. lol I guess the studying took some time before it finally affected me (like 4 months xD) ]