I may have an answer for you. The film with all the "light leaks" is likely Efke. Look closely and you will see that all the light struck the film from the side. Efke paper does not fit very tight against the edge of the spool and this problem is fairly common on cameras relying on a ruby window for frame counting. Also, loading and unloading is tricky with this film if you want to avoid the problem. So, beware, future users. If you use Efke, keep black tape over the window and load/unload in dim light. Watch out when winding, too.
Glenn: Most likely, you are right. I will avoid using EFKE with folding cameras having windows.