you should hurryup and send the application immediately.
below are the answers for your qs
1 - Do I have to include all small travel trips in the personal history and address section in the Background Declaration,, will be pain cus I travelled alot last 5 years?YES, YOU SHOULD
2- Will my wife bank account will be considered for the settlement funds?YES
3- I'm studnet in Canada now, In case my application failed, does it affect my study permit renewal in the future??,, you now in Generic Application Form they ask you if you apply to stay in Canada permanently or you have rejection in any application in the past.-IT WILL NOT....BUT, SINCE YOU ARE ALREADY IN CA, YOU WILL HAVE MORE CHANCES....
4- Both me and my wife eligible to apply,, my points are 69, her points are 70. we could not decide if one of the applications better than the other,, Can We submit 2 independence files, In case one didn't make it So we have another chance,, Or there is a role for couple to apply one application ??YES, YOU CAN SUBMIT 2 SEPARATE APPLICATIONS...
5- I'm applying for the NOC 2145, "Petroleum Engineer", I do have 4 years experience as a Petroleum Engineer, but my education background not the same, its Engineering though, but its Electrical Engineering, I switch my career after graduation,, Is that gonna make issue with the VO evaluation.NO, IT WILL NOT. BUT, IF IT GOES TO INTERVIEW LEVEL, YOU SHOULD BE ABLE TO CONVINCE THE INTERVIWER ABOUT THE CHANGE