IB not known for cs, but have replied:
'Thank you for contacting Interactive Brokers’ client services team.
Please note, dividends reversals are made when a dividend for the stock is received. It offsets the entry in Accruals section and posts the received dividend into Cash. This is made to change the entry from accrual to cash for a stock's dividend.
As per your screenshot, on 6 February 2020 a dividend accrual was posted as an entry in anticipation of USD 154 and once that amount was received this entry was closed with a USD -154 on 13 Februray 2020 and the dividend was posted into cash. You can check the NAV section of the report to see an entry of USD 154 as dividend and withholding tax of -46.20. Also, the change in dividend accruals will show the reverse entry of -107.80 USD. This is for accounting purpose only since your NAV was already calculated inclusive of the dividend value prior to the posting date.
Also for short stocks, since you are the seller, you are required to pay the dividend (not receive). Hence you see a negative deduction from the account.
If you need further assistance, please let me know.
Regards,
Het T.
IBKR Client Services'
does that make sense? does anyone else have problems seeing how the dividends they were due accumulate? IB said, USD 154 which was 'posted as an entry in anticipation' but then deducted again? and if it is added in anticipation then deducted again, won't that not mean no dividends was received by myself?