[OzzModz] Anti Bump

[OzzModz] Anti Bump 1.0.0 Patch Level 4

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I just installed this add-on and I was expecting it to work as described that user x cannot bump (reply in) a thread if he is the last poster in the thread. But I tried and even after someone else say "user y" replied in the thread after user x, user x is still shown the message that he cannot write and is asked if he wants to merge the content?

Am I misunderstanding what this addon should do?