Hi. I've already fixed the bug in a couple wordpress 4.5 updates, and can make that correction. Also encountered and resolved Visual Composer issue as well (many people had the same problem you are having). I can work on migration and fixes for you starting immediately. I've actually migrated over 90 sites for other employers, all error-free, 100% success.
To answer your questions:
1) Caribbean
2) US Eastern
3) 8am-5pm and intermittent throughout evening, then back fully at night if necessary.
4) I have skype, email (keep in mind the sharing of those details are against freelancer's terms of service and they are suspending accounts for it!)
5) No team, just me. Magento, Wordpress, Troubleshooting, Networking, Web Programming etc. (Profile gives more details - please view there and check reviews as well)
6) See Portfolio on my profile by clicking my Name.
Thank you for reading my proposal and I look forward to hearing back from you toward the start of a healthy working relationship. Kind Regards, Kenny.