Will I face issues re-entering Thailand via Mae Sai after multiple tourist visa runs, and can I transit through Bangkok when applying for an Ed visa?

Hi! I have 2 questions; 1st - I have since august 2018 1 60 days tourist visa + extension + 1 visa run (nov 2018) then 1 another 60 days tourist visa + extension. Now my extension is going to expire on feb 9th and I need another visa run in Mae Sai meanwhile I'm waiting for the MOE for Ed visa. May I have any problem in Mae Sai re-entering in Thailand?

2nd) once I receive the letter I will fly to India and spend 1 month there. From India I will fly to Vientiane to apply for the Ed visa. All the flights from India have a stop in Bkk, any problem for the transit at passport control? Thank you in advance! Your work is highly appreciated!