If in case i apply for a single entry TR visa with a validity period of 90 days and I'll be granted a stay period of 60 days so if i would stay for 30 days in Thailand from the first day of the visa validity period and leave the country for 15 days, then apply for re-entry permit. Would i be granted 15 more days by the immigration or 45 more days as the total validity period of the visa is of 90 days?