You need split-dosing and not a higher dose if it doesn't hold you all day long, so try taking your dose as 2 x 130mg and see how it works out for you. Whether you decrease your dose at the clinic is irrelevant, but in my opinion that's a very high dose to be on indeed and I would try to taper down to a minimum. Anyway, split-dosing in my experience was quite common on certain programs in my country (probably still is, but I have no info), I was never on a methadone maintenance program, but I took it as a substitute for over 2 years and I would take it twice a day, otherwise with one dose a day I had always felt uncomfortable by the evening and could not fall asleep. I'm on buprenorphine maintenance now and I split my dose into 2 doses as well, with buprenorphine it's probably more of a mental thing but it helps me feel stable all day long this way as opposed to taking the whole dose at once.