HELP - 2 BFP & 2 BFN same urine

JT
Hi Ladies - Need your help. I got 2 BFP (or what looks like it to me on the easy @ home tests so i tested with the more expensive FRER and they are clearly BFN
TMI but I also have light pink/brown discharge spotting. 
These tests were all within the time limit and i am 11 DPO
Has this ever happened to you? Thoughts?!