Select all on alarms

On the MSP when selecting all on alarms for archival, deletion or export the select only works on the subset of alarms that have been 'paged in' so to speak (initially 50). To select more, or all, one must scroll down through more or all alarms and re-hit select all. Perhaps there's a reason for this I cannot see? I expected select all to function on ALL alarms, not a subset thereof, as on the app. Cheers, S.