These 2 are definitely the same venue and it seems to me to be extremely likely that they are also the same venue as the Woodville 3.
The Civic Centre and Woodville Theatre are different parts of the same overall building, opened in 1968, and I can't imagine that the Civic element would have a discrete performance venue separate from the Woodville element in the same building.
All 5 could be merged as, for example, "Woodville Hall, Civic Centre" which should catch most future searches.
Alternatively, just merge the 3 Woodbridge into one and the 2 Civic into another (as they all historic from the early 1970s, bar one outlier from 1987).