Using 2 seperate masks to hide text behind an object. One works, one doesn't

Hello fellow Adobe community!

I'm really new to masking and have been watching tutorials but have run into a problem I can't seem to fix, could yall help me out? I'm editing a trailer to a film screening. The title lies at the base of a windshield as 2 characters are driving. The wipers are moving and I'm trying to mask the wipers to wipe over the title. I successfully did it with the left wiper and it looks really good. I tried to make a second mask and mask the right wiper but it doesn't seem to work. I trace the wiper with the pen tool and select invert under mask expansion, same thing I did on the left wiper that worked, but anything I do seems to just turn off the effect of the left wiper mask. I feel like I'm not understanding some fundumental understanding of masking. Is it possible to make 2 masks, one of each wiper, on the same text? Hope I explained this well