Good that fixed the problem! You could try using a splitter to hook up the other TV, probably a different one other than the one you had in the setup to begin with as it seems that one isn't right, or no good. Is there a part # on that splitter? A splitter will cause a loss of 2 or 3db, too. I use a distribution amp, this one, it works good:
Amazon product ASIN B002M1EPL0
but for only two TVs that one might be overkill!
Actually, just looked and they have a two port and four port model.