Blueprint paths not connected to main path

[Branes51]

I don't know if this is just for a few blueprints, but I've seen that in buildings which contain shops and which have paths inside the building leading to the shop, those paths won't connect to the main path even when placed right next to them. I really appreciate the ability to save paths and queues in blueprints, but in a lot of cases, they don't work. Even ride queues sometimes don't connect to the path. It looks like they do, but guests won't go on the ride until I build a new queue.