Are those your latest logs? If so they are still showing that you are either running 32bit windows or 32bit java. I repeat it again remove 32bit java or you will be limted to 1gb of ram for ftb. If you indeed have 32bit windows then you can't run 64bit java at all.
I have 32 bits java for now (I can't really download anything, I still have internet issues) but I have a 64 bits Windows (even if it says x86 in the logs). But even with 64 bits Java, I didn't see any difference at all.
If you had 64 bit Java and 32 bit Java FTB would still use 32 bit, since you installed it first.
1. Uninstall 32 bit Java completly (as recommended, if you want Java in your browser then get a 64 bit browser like Waterfox, just like Mozzila Firefox)
2. (Not recommended) install both 64 bit and 32 bit Java on your PC.
Then download Jarfix. Put it in the Documents folder/ Desktop. Open Command Prompt. Then do