OFX import issue

Thought I would try doing on OFX import and reconciliation - we have never tried that previously. Using Sage 300c premium 2017

Unfortunately - when exporting the OFX, I exported the previous months entries as well, so there are a bunch of entries in the OFX rec that were already reconciled in the previous period using the manual reconciliation process.

That is one issue - can I simply delete the previous period entries (or all of them if I decide this was a mistake) from BKUNMAT? It is not linked to anything else?

Second issue - it looks like this might be a complete waste anyway, as it is not matching much - 6 of 263 entries. I thought it might be more intuitive and match by amount and date, but it looks like it only uses cheque number? We do mostly EFT, so I guess that makes the OFX route useless?

Any recommendations on a module?