I've got two relics in my empire's influence, both of them Control relics. One of them has one starbase, the other has two (just because I was testing whether you could stack multiple SB's on one relic resource - seems the relic can't be owned by more than one simultaneously, even though it lets you build the relic modules!).
Both relics, even the one which DEFINITELY only has one starbase anywhere near it, look like this:

And here in the empire resources, you can see the game is treating it as though I've got 4 relics:

In management view (both owning starbases for each relic have screens which look like this):

So yeah! I'd just like to be sure whether this is a bug, or if it's as a result of some tech, policy, culture or racial trait I've got, but I can't find any activated policies which talk about doubling relic effectiveness, can't see any techs in my tech library which explicitly state relics will be doubly strong (one says they'll become more effective in what I think is just FLUFF text, and is actually about providing you with a new module, I think?), I'm playing Inteuri the eye guys, and I've maxed out the Traditionalism culture tree and got Glorious Legacy all done.
Anyone else's relics doing this? Is it just a wee bug? Thanks for reading