Missing blueprints after unlocking Ray Patterson

Hello, I have an issue with monorail event. Today I unlocked Ray Patterson and started collecting blueprints for extra monorail pieces. Ray Patterson is unlocked at 89530 blueprints and I currently have 95822, so it means I am 6292 blueprints ahead, but the task 'Ahead of the Track' shows that I am only 2935 blueprints ahead, where did the rest 3357 blueprints go? I haven't received any extra rail pieces yet.

P.s. I received a daily bonus 5000 blueprints and they unlocked Ray Patterson, and from these blueprints 3357 went missing. :?