I collected a bus time table of sorts at the tourist information office in Guardamar over a year ago. Per this time table the buses are few and far between ,with a slightly better service in July and August but hopefully ,as already stated, if we use the service it may improve. The timetable shows buses frome Orihuela to Formentera and Rojales at 6.45,715,10.30, 1145,1330,1415, 1530, 1830,1930...those are workdays.I would assume that this bus goes through Almoradi.
Reverse is Formentera to Orihuela at 7.20, 740,830, 1035, 1050, 1415, 1520 and 1905
Formentera to Guardamar 1225, 1410 1905 and Guardamar to Formentera 1000, 1400, 1800
I did test the 1000hrs from Guardamar to Formentera a year last January and it worked as did the 1225 back to Guardamar. I hope I have copied the times down correctly and that it is of some use and not too confusing!!!.