I do not see a height anywhere or an age, which would help.
Assuming side effects are ok, then I would advise increasing with the aim of getting to 15mg a week if that is tolerated ok. Just going on the weight of 260 lbs plus 40 already lost, without knowing height, it still sounds like pretty significant obesity.
This forum always emphasises as low a dose as possible for as long as possible, and if overweight or a bit obese may be good advice, but in more severe long term obesity, the odds are you are going to need the highest dose anyway and those doses are the ones proven to improve long term health outcomes the best. I am not recommending increasing doses when weight loss is already rapid or side effects are a problem, but it does not sound like that is the case here anyway.
Over the longer term fluctuations in fluid balance are going to cause ups and downs in weight. If you are eating the same number of calories that has caused weight loss before, the odds are it is still happening, even if the scales do not move, weighing less often can help, or you can measure waist circumference instead. Over the very long term, above 6 months to a year or more weight loss is likely to slow down as you reduce energy expenditure from having less cells using energy and from metabolic adaptation to long term low calorie input. I do not subscribe to the theory that increasing calorie intake helps with this. Real world energy expenditure rarely has a lot to do with what EE calculators create especially in severe obesity and even less so after weight loss. The only reasonably accurate way to determine caloric deficit is to calculate it based on weight loss, where each kg of weight loss is 7700 kcal.
Once you get to a true stall that will usually take about a year or a year once on max doses, then you can work out where to go from there, Do not know BMI so hard to guess, but if of average height, there is a fair chance you might need to consider higher than standard doses or adding in cagri or elora at that point, depending on if you get less or more than average amounts of weight loss.