I'm having the same problem with the same MATCH dividend.
I've experienced the same bizarre treatment. IG withdrew money from my ISA on the 23rd, in relation to the $2 special dividend on MATCH, then credited me a greater amount on the 25th. This means I'm missing 89% of my dividend amount.
IG have advised me as follows, without specifying which aspect could be affecting me in this instance:
Dividend reclassification refers to changes companies make to all or part of previously reported dividend income to some other tax classification.
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