Hey Louisa!
Yeah, in the past, there definitely a lot of us who sort of identified as being part of multiple guilds. We called ourselves polyguilds, and we usually had some clever names for it (I was a combination of Weatherwatch and Gossmere, otherwise known as a Weathermere). However, since we’ve found the bearings, most of us have sort of “found our homes” in one guild again, if that makes sense? This thread is Out-of-World, so I didn’t want to link it outright, but this is CJ’s stance on it. I’d read until post 38 for the full picture 
Now that everyone’s got their bearings (sorry, I just had to), it’s a bit easier for many of us to find ourselves in a single guild that we’ve chosen (not just one that the guide chose for us - remember, you always can choose a different guild). That weird part of me that seeks understanding and not just “discovery”? Well, understanding isn’t just a Gossmere trait (or a Thornmouth one, either) - it’s also one of Celestant-bearing Weatherwatch. However, if you’d still like to identify as both you can; what I’m stating is just the general opinion of the community now. If you’d still like to be added to the Flinterforge group, though, just let me know and I’ll make sure it happens 