GMAT Story - what happened ? any suggestions

[prithviraj.dasari]

I am non-native speaker, and studied in Telugu medium (1-10th standard).
I have been , qualitatively, studying for GMAT religiously for 6months.

Gmat mock prep written when i started my prepration that was in Early january this year.
Jan 2010 - gmatprep - 640(M49,V27)

All my mock tests are taken in real exam conditions.
Here are my Manhattan round1 scores -
July 4th mgmat1 - 600(M47,V27)
July 11th mgmat2 - 660(M47,V33)
Aug 1st mgmat3 - 660(M47,V33)
Aug 8th mgmat4 - 680(M46,V37)
Aug 15th mgmat5 - 650(M49,V31)
Sept 12th mgmat6 - 650(M51,V31)

Here are my Manhattan round2 scores -
Sept 15th mgmat1 - 730(M50,V39)
Sept 19th mgmat2 - 660(M50,V32)
Sept 25th mgmat3 - 720(M49,V39)
Oct 3rd mgmat4 - 680(M51,V33)
Oct 5th mgmat5 - 750(M51,V41)
Oct 10th mgmat6 - 700(M50,V35)
GMAT prep scores -
Oct 8th gmatprep1 - 600(M49,V22)
Oct 11th gmat prep2 - 700(M50,V35)

Oct 13th Real GMAT - 580(M49,V20)

I am not sure what happened in exam. I was not nervous. I thought, i was answering fine
I am having 5 years of working exp. in IT. I would like to do MBA in finance from one of top 30 institutes.
I would like to get minimum score of 720.
any suggestions what should i do? if some one suggests me of training institute, which institute?

Thank you,
Prithvi.

[beatthegmatinsept]

Oct 8th gmatprep1 - 600(M49,V22)
Oct 11th gmat prep2 - 700(M50,V35)

What did you do in 3 days that your Verbal score went up from 22 to 35? Clearly, verbal is where the inconsistency is. I am wondering if GMAT Prep 2 that you took on Oct 11th was a retake and you got previously attempted questions? Such a huge gap in Verbal scores is quite astonishing.

[prithviraj.dasari]

I taken gmat prep tests, only once.
For first test, I was little bit nervous. Still, I performed equally in both tests.
Yes, I performed equally. That has been my problem - inconsistency.
I require help to solve it.

Thank you,
Prithvi.

[gmatmachoman]

I taken gmat prep tests, only once.
For first test, I was little bit nervous. Still, I performed equally in both tests.
Yes, I performed equally. That has been my problem - inconsistency.
I require help to solve it.

Thank you,
Prithvi.

Plz do have a look on my post named R&D on GMAT prep in GMAT strategy section. Hope u can have some insights!