Undercover flex install help

I have a 2015 Toyota Tacoma TRD sport with a 6ft bed that I recently installed an undercover flex hard tonneau cover on. My problem is that I am experiencing problems with the cover leaking at the end of the seams where it meets the bed rails. Has anyone else installed one of these covers on a Tacoma and had success ? The cover gets very good reviews for this truck and I don't hear a lot of complaints about the cover leaking as I do others. Please, any feedback will be appreciated. I am hearing a lot of people say stay away from hard trifold if you want to remain water tight. I don't care about a drop of water every now and again, I just don't want a stream running down my bed defeating the purpose of running at cover. Thanks guys and gals

 

Having a similar problem did you find any solutions?