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In plugin details page I pushed Update button that is below the "Permanent Link to Plugin". I changed Category from "editor" to "Tools" and submited the change. Then there appears "editor" in details instead of Tools. Even when I push Update again there is still "editor". To update this information you need to go to the My Plugins page and push Update. Then update works properly.
I wasn't setting the current plugin on the sessionbean to the new modified plugin after submitting the update.
Verified.