There is no limit on surface sectors within a continent, but trans-oceanic surface sectors are generally not allowed (as always, there is an exception, but it is not relevant to you). Having surface sectors might make you ineligible for an e-ticket and force a paper ticket, but that isn't bad. IPC is very isolated and there is very little there (almost no hotels, restaurants or tourist infrastructure). Just a beautiful part of the world that is hard to get to (and an excellent use of OWE).