This verse is not saying that they are Apostles. St. Paul calls them his kinsmen and fellow prisoners who did outstanding work among the Apostles. "Among" means "with" or "by". They were outstanding people with the Apostles.
LOL,
follow the context, acid test the word "Note", and "among".
Romans 16:7 "Salute Andronicus and Junia, my kinsmen, and my fellowprisoners, who are of note among the apostles, who also were in Christ before me.
the context is fellowprisones, the "SAME AS PAUL" in the ministry.
Note"
G1978 ἐπίσημος episemos (ep-is'-ay-mos) adj.
1. remarkable
2. (figuratively) eminent
[from G1909 and some form of the base of G4591]
KJV: notable, of note
Root(s): G1909, G4591
Now, Among
G1722 ἔν en (en) n.
1. "in," at, (up-)on, by, etc.
{Often used in compounds, with substantially the same import; rarely with verbs of motion, and then not to indicate direction, except (elliptically) by a separate (and different) preposition}
[a primary preposition denoting (fixed) position (in place, time or state), and (by implication) instrumentality (medially or constructively), i.e. a relation of rest (intermediate between G1519 and G1537)]
see the definition, " i.e. a relation of rest". a RELATION OF THE REST, they was apostle, also. how simple.
these was in the apostleship, even before Paul. "the apostle stated, who was in Christ before me".
another crutch taken away.
I really don't know who have been teaching you, but I suggest you need a change of teachers.