Closer to 10 months actually. Redcloak implied that 10 and half months had passed since the Battle of Azure City in
#702.
And Haley & co. taking 6ish months to get to Greysky doesn't seem too implausible.
The Sunken Valley is a few days away from Azure City, and according to the map at the back of WaXP, Hobgoblin City is around 3 times that distance--and Greysky City is even further up north. So it could be like a 3 month trip to Greysky, but at around 1 month is when Haley turned back to the Oracle (so let's say 2 weeks back). From the Oracle's tower to Greysky should have been something like 2 months and a half, but Belkar's curse severely slowed them down. (These are all just random numbers, but they add up and make sense to me.)
The biggest problem is that apparently Miko went to Dwarven Lands and back in like a week or two. But maybe she found wizards/sorcerers/clerics with the Travel domain willing to help. Maybe Shojo's personal Wizard Guy gave her a one-way teleport there.