e-Visa index E31A is a single entry visa purpose for those who married to Indonesian wife/husband. It is valid for 90 days. The e-Visa is your entry permit but not your staying permit. If you meet the conditions, you will automatically obtain the Electronic Limited Stay Permit (e-ITAS) and the Re-Entry Permit upon arrival at the Immigration Checkpoint (you do not need to go to the immigration office to obtain a Limited Stay Permit and Re-Entry Permit).
Kitas is a Stay permit valid for 1 or 2 years from arrival date with multiple entry.