Pontsticill Junction -- as against the heritage railway's plain Pontsticill -- though I uneasily get the "minefield" feeling here.
Your "minefield" unfortunately has struck again, as the station in question was the only one there, but had carried both the names of Pontisticill and Pontisticill Junction and as such cannot be used on this quiz, being a once-closed station that was reopened by a heritage railway.
Taking that as Talyllyn Junction (MWR platform) that closed in 1878, on the approach chord from the Brecon and Merthyr Railway.....
Would we have passed through Bargoed prior to that?
Yes - but Bargoed is an open station on the Rhymney Line from Cardiff and I don't think it has been relocated.
Glasbury-on-Wye
The currently open Bargoed station, according from what I have been informed is not the same as the closed one on the Brecon and Merthyr Tydfil Junction Railway which was a junction station in a different location. That closed station (closed to passengers 31st December 1962) had its trackwork lifted and the remains of the permanent way are said to be visible.
A similar situation is experienced in the Craigendoran station area in Scotland.
I think this is the same point that we discussed at length some months ago. Based on maps from 1876 to 1972 and all the sources that I have, there have only ever been two stations in the town of Bargoed. One was built by the Rhymney Railway on its line to Rhymney but also used by Brecon & Merthyr trains to Brecon and is still open. It is just south of the site of Bargoed North Junction and was indeed called Bargoed Junction on some maps. The other was on the Brecon & Merthyr branch to Rhymney and we have already visited it (as Aberbargoed) on this journey.
Eardisley
Hereford (Moorfields)...I am assuming this was a through station, although I don't have any firm evidence one way or the other.
Hereford Barton