Technically, Link went back in time thrice (in cannon of course). First to enter the well, second to enter the spirit temple, and third when Zelda sent him back. However, your rule is still valid because of how the time travel is activated. The first two are via the same method: Temple of Time. However, Zelda forced the issue herself the third time and even sent you back farther than you should have been able to go. Well, you managed to make sense of the trident-split. I think its high time I ditched my timeline theory and kept up with making sense of the cannon one. Thanks for the help.