Computer says no

When I got married, I decided to keep my maiden name at work but use my married name elsewhere and so I have had two names for almost a year. Other than the occasional moment of having to think twice about which name I’m signing with, having two names doesn’t generally cause a problem but I’ve now discovered that certain computerised forms can’t cope with it and keep getting sent back to be filled in “properly”. I’m sure I can’t be alone in using both maiden and married names so why does finding a solution seem to be so difficult?