I agree with Darkstorm, something is wrong with that juice and trying to use it could ruin your atties or worse, make you sick. There is no way to prove what the vendor says is true, but it seems to me it was heated up, which evaps what water is in it. VG can be reduced by boiling down to a jelly. I try small bottles from different vendors and I have received many I found to be unusable due to taste, consistency, etc. It is less painful to throw away a small bottle. Order a small sample, then order a bigger bottle if you like it. If the vendor does not offer a sample size (5ml) then they don't have repeat business and you should move on to another vendor.
For reference, cuz I think you asked, I vape 3-5ml a day. Your consumption will vary due to vaping style and what hardware you use. I vaped about 1ml a day with the standard 510 pen style