Is the 6 month multiple visa valid in 90 day batches ,,meaning after 90 days you need to extend for another 90 days without leaving Thailand ..£150 right ?
English is not your first language,im well aware of the differences in terminology of stamps ,,,you yourself have used the wrong English Wording with regards what the stamp is called when entering at the border ,,im well aware of visas obtained outside Thailand and visas inside Thailand so your responding to the wrong person or just behaving like you know everything because you have been ex amount of years in Thailand ,,,you weren’t in Thailand in 84 and the same rules applied them as they do now ,
I’ve had more visas stamps of all kinds than you have had som tam at 5 baht
all these soft borders or embassies soon got tightened up including savanakhet which of course Is mukdahan crossing for many ..never assume what holds now is ok even tomorrow in Thailand and advertising 0% will draw attention ,,,eventually
an ED VISA is only 3 months old,,then it’s up to the discretion of the immigration officer ,,,normally never a problem ,but it does happen that no extensions are giving