Few exceptions in Angs range doesn't give error

[MySmilingTurban]

The API provides
{"error":true,"data":{"error":"That ang does not exist or no updates found."}}
only at 0 in G source.

But it isn't providing the expected error for Angs > 1430
For example, 1431

For negative values, it gives out Ang 1 for every Source,
-1 for G
-1 for D