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When you Import the Bank Statement Lines that is when the Auto Match is actioned between the statement lines and the readysell bankrec lines based upon the rules on the Tenders, the date, payment reference and value.
When importing the Bank Statement Lines, the system will create a number of Bank Deposits/Bank Payments if you have Bank Reconcilation Rules set up correctly based upon the Search Reference.
Once you review and finalise these auto created Banking Payments/Deposits, they will auto match in the Bank Reconciliation.
If you have not posted these bank payments and/or deposits, do not attempt to reimport the bank statement lines again as it will create numerous bankings.
If you have posted these bank payments and/or deposits then it is fine to reimport Bank Statement lines if you have overlooked entry of Customer or Supplier Payments.
If whilst in a Bank Reconcilation, you insert a New Bank Payment and/or Bank Deposit the system will not auto match unless you reimport the Bank Statement lines again.
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