I would guess you will be o.k. 18650 Li-ion cells are fairly resistant to abuse and in parallel and charged at only 1A they should be fine.
If I was doing it, for my own comfort, I would probably charge each cell individually from time to time just to make sure that they are both still behaving similarly. The problem with permanently connected parallel packs is that you can't easily tell if one of the cells is dying while the other is taking all the load.
Steve