Hi Dave
Thank you for contacting Reckon Community.
I have tested on my 64 bit machine, and I can adjust the columns width at both the area you have mentioned. See the attached screenshots and note the colomn width for Gain/Loss. Which is bigger on 2nd screenshot.
I believe the issue may be local to your PC. Please try below suggestions:
2. If the issue persists try reinstalling the program.
Hope this helps. Please let me know how it goes.
Regards
Shisir