Sorry but you applied a bit to early to get the full advantage of a METV. You’ll get 60 days upon arrival the 8 of June and can do a 30 days local extension or do another re-entry. If you re-enter short time before the September 25 you’ll still get another 60 days stay and can apply for a 30 days extension.
60 days visa exemption is offered to passport holders from 93 nations. If you’re not among these you’ll need to a apply for a tourist visa to get a 60 days stay.
Onward ticket within 60 days is basically an airline issue rarely checked in the immigration and a changeable flexi ticket is a good option for a 90 days stay.
yes, you can only apply for a visa at your current location even if it’s done online and you’ll have to be in Laos to apply for a tourist visa. You might risk they’ll ask you to upload all your passport pages including blank ones to confirm your location. Anyway visa process or processing time first start when payment is done in cash in Laos.
If you take the second (2) escalator up, go through security and down to immigration you’ll see the Re-entry office in the right corner opposite the immigration desks.