Hello - I have been working on a city thats around 134900, however, it keeps pushing me back. Please, can someone help me? Thanks

I think that i am being pushed back early. I checked the live map and it world line is further than where I am building.

I have started to build a new city. I've been working on it for a while, but now, it keeps saying that I have reached the end of the map, which ironically is at the foot of the city gate. Why is this happening? Also, some times I can get into the city to work on it and other times I can. Please help. - BSU