Commonwealth Games bronze medallist Steph Twell won both the 800m and 1500m at Guernsey's annual Intertrust Golden Meeting at Footes Lane.
Twell won the 800m by 0.7 seconds and the 1500m by almost a second.
Despite Twell's time of 2 minutes 09.34 seconds, missed the Commonwealth Games 800m qualifying standard.
Whitty's time of 2:12.86 was just under the off the 'B' standard of 2:12.00 she needs to make Glasgow 2014.
In other events, island won the 200m title, while Lee Garland cruised to the 5,000m title, winning the race by more than 15 seconds.