Yes those 2 months have been over for quite a while now.
k, as that is clear, to the question of fiefs.
A claim is just that, you claim something or anything, there is no implied right for you included.
You can claim the complet map, aslong you don't have the forces to make those claims reallity such a claim would be mute. Claiming only says, i want this and if you want this too, we may get into trouble.
So options
a) retreat from your claims, war may end
b) fight over your and Hosp claims, that would be war then and whoever can force his claims will be the owner of those fiefs.
Reasons for these actions:
now that can be tricky ^^ and i am not that deep in NA relations that i would know for sure, but from what i read here sofar and from what i read out of the map and was told over the game about NH and Hosp.
Hosp are the evil bad behaving arrogant bastards claiming too much being too big with lots of vassals or allies and overall they need to go down ... about right ;) ?
NH would be the proxy planted by TKoV and making most of their trade with TkoV, taking out a trading partner may be an indirect way to hurt someone else on the other end of the trade. Then there are the fiefs which Hospitaller originally owned and were taken from them when they were at war with many others already.
Overall with FCC and NH as opponents for Hosp it may become an intresting war, FCC and NH should be able to easily match Hosp numbers eco as well troops and gear. Only slight disadvantage FCC carries is the distance, but with the level of organization we have seen from them this aint a real issue. If later on TkoV would have finished of Occitan and would join in there or perhaps would deliver troop/gold/gear support even before, this may bite Hosp in the ars pretty fast.
Good luck for both sides