What is probably happening when you go Kanji to Keyword is the Kanji is invoking the story in parts because you see the primitives. You could see it as cheating, but I think what's happening is your not attaching the keyword to the kanji.

When it's keyword to kanji, you at first try to vividly remember the story. Over the next few times, that becomes old hat, so you just recall the primitives. After that, even the primitives kind of get blown past so that just the keyword itself brings to mind the picture of the kanji.

Now, on an "I'm gonna try it later" note, once I get 90% of the RTK list into block 5 or higher, I will be using Kanji Gold to begin Kanji to Keyword review.

Perhaps, with electronic flashcards that note the differences of your review (like Anki), it may not be as bad. Heisig came up with his suggestion when paper flashcards were the going tread. With computers, things change.

Going Kanji to keyword will help you remember the exact keyword Heisig used.
Reviewing keyword to kanji will help you remember the meaning of the kanji for when you see it in some Japanese writing, but maybe not the exact keyword Heisig used.