it's fine to transplant them again. Space them around 6-8 foot apart depends on kind and root system but that will be ok for those you described. I got all of the same except for Williams and mine are spaced like that and are perfectly growing and producing well.
they like to be planted in groups of 2 or more close so each can help support the other from the elements wind sun etc. If the roots are twined together you will not hurt them buy cutting them to separate them if you have to. Bananas are tougher than you might expect. hope this helps you.
bananagurl this might help you find some answers to your questions>>>>
Banana Trees Banana Plants<BR> How to Grow Information.
my answers aren't always perfect but I always try to help.