I’ve just tried running the reconciliation tool (as above) on a test account, it actually lists more than the 50 transactions. I believe this was relaxed some time ago as it’s a ‘one off’ process rather than repeated. This would allow you to check more transactions in one go.
Is this not the case with your account? If not, can you walk me through the process you are doing and I’ll try and replicate it
Alternatively, are you able to check smaller periods at a time? The 50 page limit is in place to prevent a large load on our servers. There’s more info on this, in a post by @Glenn.