OPT Ext Rejections due to Multiple course changes?

[DesiOPT-FaceBook-Admin]

OPT/CPT Blast Resume to 2500+ employers via http://bit.ly/18niNwb

Its good to hear from awesome answers for Students issues. I appreciate for your support.

Well I came to US on F1 visa on basis of pursing PHD, then I changed my mind to MSCS and after 1st Sem I changed to MSEE and all 3 course are transfered in 1 Univ only.
Right now my MSEE will be ending soon in Dec 2013,consequently OPT starts & planning to join in software firm.

So my Questions are

1. I changed different field and about to work in a different field. Will there be any chance of OPT EXT being rejected?
2. At the time of OPT EXT,will there be any problem in issuing Ext.?
3. Do I have to hurry up for H1 in 2014 and not take any chances in future?
4. Should I wait for extension till end of 2014?
Please help me guys

This was posted on https://www.facebook.com/desiopt1 on 11th Nov 2013

[DesiOPT-FaceBook-Fan]

1 nay everything will fine.
If.u still worried then apply ext 6 months before opt.end date ..

[F1struggle]

No issues, your I-20 will have the latest program information.