No, the latitude, longitude and track_size aren't configured that way now. I tried to add validation to them after I sent the code attachment but it didn't work. I tried it by adding the "." as an allowed character with the setting of alphanumeric but it didn't help.
And I guess the problem is not so much a validation problem as it is a data insert problem. It just will not insert a "." into the column at all. It will insert the "minus sign" however. I thought it was strange that it won't even accept a "." when the column is set to VARCHAR.
Maybe I didn't get the validation applied correctly when I tried it????
Let me know if you need the database schema or anything sent if that would help.