Have you actually completed 2 years employment ? Because that is when the 'tied' permits usually switch over for Non-EU to 'open' visas - possibly the person who wrote the note was basing it on your current status (this week) rather than your new permit which would be due...

I literally changed jobs the day I went from an 'L' dependent, with work permission, to a 'B' dependent - not a day sooner!

Were you on an L permit for the first two years ?