No need to apologise! It's absolutely fine and won't cause any problems for anyone else.

Doing the necessary "plumbing" to connect it up for routing and accessibility can be a bit tedious, but I think it's worth it on busier roads.

If it would be helpful, I could take a look at a bit of Horn Lane tomorrow and do a couple of the crossings as an example? (Note that some mappers differ in how they map crossings, so there isn't one "right" way to do anything)