The patch probably did apply for you, but Frontier went the extra mile to make sure you don't have to fix it yet again! [big grin]
The description is a bit cryptic, but this line says it all:
When you open the park in 1.2 and save it, the 1.2.1 patch will not correct the fences and leave them as they are, either wrongly positioned or not. Meaning that you have to correct them yourself. And you already did so, so it's all good!
The description is a bit cryptic, but this line says it all:
Only parks using this piece that were saved prior to patch 1.2 and then saved after patch 1.2 might need some adjustment
When you open the park in 1.2 and save it, the 1.2.1 patch will not correct the fences and leave them as they are, either wrongly positioned or not. Meaning that you have to correct them yourself. And you already did so, so it's all good!